0001193125-26-102364 | 10-K | XBRL Viewer

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Debt - Summary of annual principal maturities of long-term debt (Detail) $ in Thousands	Dec. 31, 2025 USD ($)
Summary of annual principal maturities of long - term debt
2026	$ 129,000
Total	$ 129,000

Segment Information (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Summary of Reconciliation of the Company's Reportable Segments' Net Income (Loss) from Continuing Operations


For The Year Ended December 31, 2025
	RNG		REG			Total
Operating segment revenue	$	155,736	$	17,231		$	172,967

Corporate and other revenue							3,415
Total consolidated revenue						$	176,382

Less (1)
Payroll and related expenses		9,242		3,143			12,385
Wellfield operating and maintenance		7,220		3,035			10,255
Plant expense		2,276		1,501			3,777
Waste disposal		2,415		161			2,576
Preventative maintenance		15,045		3,189			18,234
Breakdown expenses		2,069		1,368			3,437
Utility expense		16,376		514			16,890
Royalties, transportation, gathering and production fuel		30,986		1,959			32,945
Depreciation, depletion and amortization		24,377		5,332			29,709
Impairment		3,107		120			3,227
Other operating expenses (2)		4,450		1,779			6,229
Operating segment expenses	$	117,563	$	22,101		$	139,664

Corporate and other operating expenses (3)							35,866
Total consolidated operating expenses						$	175,530

Operating segment income (loss)	$	38,173	$	(4,870	)	$	33,303

Corporate and other operating loss							(32,451	)
Total consolidated operating income						$	852

Operating segment other expenses	$	15	$	50		$	65
Corporate and other expenses (4)							3,274
Total consolidated other expenses						$	3,339

Operating segment income (loss) before income taxes	$	38,158	$	(4,920	)	$	33,238

Corporate and other loss before income taxes							(35,725	)
Total consolidated loss before income taxes						$	(2,487	)

Operating segment assets	$	201,056	$	192,152		$	393,208
Corporate and other assets							42,252
Total consolidated assets						$	435,460

Operating segment capital expenditures	$	38,693	$	77,618		$	116,311
Corporate and other capital expenditures							231
Total consolidated capital expenditures						$	116,542

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $19,152, insurance of $4,646 and professional and IT fees of $4,843.

(4) The majority of other expense (income) for Corporate and other are interest expense of $4,816 and income from equity investment of ($1,485).


For The Year Ended December 31, 2024
	RNG			REG			Total
Operating segment revenue	$	157,983		$	17,753		$	175,736

Corporate and other revenue								-
Total consolidated revenue							$	175,736

Less (1)
Payroll and related expenses		8,516			2,226			10,742
Wellfield operating and maintenance		5,104			3,537			8,641
Plant expense		2,262			1,133			3,395
Waste disposal		2,353			54			2,407
Preventative maintenance		13,677			3,607			17,284
Breakdown expenses		1,736			469			2,205
Utility expense		15,571			310			15,881
Royalties, transportation, gathering and production fuel		29,529			1,973			31,502
Depreciation, depletion and amortization		18,192			5,099			23,291
Impairment		843			743			1,586
Other operating expenses (2)		4,168			1,425			5,593
Operating segment expenses	$	101,951		$	20,576		$	122,527

Corporate and other operating expenses (3)								37,086
Total consolidated operating expenses							$	159,613

Operating segment income (loss)	$	56,032		$	(2,823	)	$	53,209

Corporate and other operating loss								(37,086	)
Total consolidated operating income							$	16,123

Operating segment other income	$	(32	)	$	(1,010	)	$	(1,042	)
Corporate and other expenses (4)								4,988
Total consolidated other expenses							$	3,946

Operating segment income (loss) before income taxes	$	56,064		$	(1,813	)	$	54,251

Corporate and other loss before income taxes								(42,074	)
Total consolidated income before income taxes							$	12,177

Operating segment assets	$	187,438		$	107,519		$	294,957
Corporate and other assets								54,058
Total consolidated assets							$	349,015

Operating segment capital expenditures	$	25,403		$	36,280		$	61,683
Corporate and other capital expenditures								640
Total consolidated capital expenditures							$	62,323

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $23,847, insurance of $5,488 and professional and IT fees of $4,141.

(4) The majority of other expense (income) for Corporate and other is interest expense of $5,276.


For The Year Ended December 31, 2023
	RNG		REG			Total
Operating segment revenue	$	156,455	$	18,449		$	174,904

Corporate and other revenue							-
Total consolidated revenue						$	174,904

Less (1)
Payroll and related expenses		7,620		1,850			9,470
Wellfield operating and maintenance		3,659		2,080			5,739
Plant expense		2,874		806			3,680
Waste disposal		2,103		24			2,127
Preventative maintenance		10,202		3,822			14,024
Breakdown expenses		2,711		832			3,543
Utility expense		15,168		579			15,747
Royalties, transportation, gathering and production fuel		32,876		1,985			34,861
Depreciation, depletion and amortization		15,720		5,193			20,913
Impairment		777		125			902
Other operating expenses (2)		3,458		1,749			5,207
Operating segment expenses	$	97,168	$	19,045		$	116,213

Corporate and other operating expenses (3)							35,051
Total consolidated operating expenses						$	151,264

Operating segment income (loss)	$	59,287	$	(596	)	$	58,691

Corporate and other operating loss							(35,051	)
Total consolidated operating income						$	23,640

Operating segment other expenses (income)	$	16	$	(24	)	$	(8	)
Corporate and other expenses (4)							5,282
Total consolidated other expenses						$	5,274

Operating segment income (loss) before income taxes	$	59,271	$	(572	)	$	58,699

Corporate and other loss before income taxes							(40,333	)
Total consolidated income before income taxes						$	18,366

Operating segment assets	$	176,951	$	73,369		$	250,320
Corporate and other assets							99,918
Total consolidated assets						$	350,238

Operating segment capital expenditures	$	41,325	$	21,682		$	63,007
Corporate and other capital expenditures							84
Total consolidated capital expenditures						$	63,091

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $20,396, insurance of $5,951 and professional and IT fees of $5,399.

(4) The majority of other expense (income) for Corporate and other is interest expense of $5,753.

Summary of Revenue by Major Customers

For the years ended December 31, 2025, 2024 and 2023, two, four and three customers, respectively, made up greater than 10% of our total revenues.


	Year Ended December 31, 2025
	RNG			REG		Corporate		Total

Customer A		17.4	%		—		—		17.4	%
Customer B		11.3	%		—		—		11.3	%

	Year Ended December 31, 2024
	RNG			REG		Corporate		Total
Customer A		17.6	%		—		—		17.6	%
Customer B		15.7	%		—		—		15.7	%
Customer C		13.8	%		—		—		13.8	%
Customer D		11.8	%		—		—		11.8	%

	Year Ended December 31, 2023
	RNG			REG		Corporate		Total
Customer A		22.0	%		—		—		22.0	%
Customer B		11.7	%		—		—		11.7	%
Customer C		11.7	%		—		—		11.7	%

Income Per Share - Schedule of Basic and Diluted Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 1,748	$ 9,734	$ 14,948
Basic weighted-average shares outstanding	143,020,271	142,279,079	141,727,905
Dilutive effect of share-based awards	55,820	118,414	423,735
Diluted weighted-average shares outstanding	143,076,091	142,397,493	142,151,640
Basic income per share	$ 0.01	$ 0.07	$ 0.11
Diluted income per share	$ 0.01	$ 0.07	$ 0.11

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Cybersecurity Risk Management, Strategy and Governance	12 Months Ended
Cybersecurity Risk Management, Strategy and Governance	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	ITEM 1C. CYBERSECURITY. We have processes in place for identifying, assessing and managing material risks associated with cybersecurity threats. For a discussion of how risks from cybersecurity threats affect our business, please see our Risk Factors discussion under the heading, “Cybersecurity and Information Technology Risks” in this Form 10-K. Risk Management and Strategy Enterprise risk management is the responsibility of our executive management team consisting of our chief executive officer, chief financial officer, chief legal officer, chief operations officer and our vice president of environmental, health and safety. Our executive management team meets on a weekly basis and discusses cybersecurity on an ad hoc basis when it is relevant. Our chief information officer, who reports directly to our chief executive officer, and our director of Internal Audit are primarily responsible for management of cybersecurity risk. Our chief information officer is an active ISC2 accredited member with 16 years of information technology experience, namely in developing solutions focused on private and hybrid cloud computing systems for small scale organizations. In accordance with our overall enterprise risk management process, our executive management team supervises our chief information officer to assess, identify, report and manage material risks from cybersecurity threats and relies on our director of Internal Audit to assess, identify and report those risks. As part of this process, we rely significantly on third-party providers to assist us with our cybersecurity risk management and strategy. These providers supply ongoing services including consulting services, access to a virtual CISO, threat monitoring and detection, threat response and mitigation strategies, updates on emerging trends and developments with policy and procedure guidance. Other service providers offer targeted assistance such as security and forensic expertise on an as needed basis. We also maintain cybersecurity insurance. With respect to our employees, we run a multi-faceted security awareness program that includes regular, mandatory trainings for our personnel on data protection and malware detection, policy and process awareness, periodic phishing simulations and other kinds of preparedness testing. As part of our Sarbanes-Oxley controls, our Internal Audit department tests our IT policies including those pertaining to passwords, backup and recovery, user access, change control and hardware and software maintenance. These audits assess key information security and cybersecurity risks in the environment that may affect the confidentiality, integrity and availability of financial reporting systems and data. Additionally, key employees complete a survey containing questions about cybersecurity in connection with the quarterly Sarbanes-Oxley certification process. If any control deficiencies that represent material cybersecurity risks are identified in connection with these audits, those would be reported to the Audit Committee and Board of Directors. We also obtain SOC 2 certifications from certain of our third-party service providers. As of the date of this Annual Report on Form 10-K, we have not implemented formal processes to oversee and identify risks from cybersecurity threats associated with our use of third parties. We are working toward the implementation of a third-party risk management program. We believe that this program will better enable us to identify and manage material risks from cybersecurity threats related to our third-party service providers. As of December 31, 2025, we have not identified any risks from cybersecurity threats (including any previous cybersecurity incidents) that have materially affected us, our business strategy, our results of operations or our financial condition. For a discussion of risks from cybersecurity threats that could be reasonably likely to materially affect us, please see our Risk Factors discussion under the heading, “Cybersecurity and Information Technology Risks” in this Form 10-K. Governance The Audit Committee is tasked with overseeing our risks related to cybersecurity, including reviewing the state of our cybersecurity, emerging cybersecurity developments and threats, and our strategy to mitigate cybersecurity risks. From time to time, members of our executive management team and our directors of Information Technology and Internal Audit provide updates to the Audit Committee and the Board of Directors regarding cybersecurity incidents and cybersecurity planning.
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	If any control deficiencies that represent material cybersecurity risks are identified in connection with these audits, those would be reported to the Audit Committee and Board of Directors. We also obtain SOC 2 certifications from certain of our third-party service providers.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee is tasked with overseeing our risks related to cybersecurity, including reviewing the state of our cybersecurity, emerging cybersecurity developments and threats, and our strategy to mitigate cybersecurity risks. From time to time, members of our executive management team and our directors of Information Technology and Internal Audit provide updates to the Audit Committee and the Board of Directors regarding cybersecurity incidents and cybersecurity planning
Cybersecurity Risk Role of Management [Text Block]	Our executive management team meets on a weekly basis and discusses cybersecurity on an ad hoc basis when it is relevant. Our chief information officer, who reports directly to our chief executive officer, and our director of Internal Audit are primarily responsible for management of cybersecurity risk. Our chief information officer is an active ISC2 accredited member with 16 years of information technology experience, namely in developing solutions focused on private and hybrid cloud computing systems for small scale organizations. In accordance with our overall enterprise risk management process, our executive management team supervises our chief information officer to assess, identify, report and manage material risks from cybersecurity threats and relies on our director of Internal Audit to assess, identify and report those risks.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Audit Committee is tasked with overseeing our risks related to cybersecurity, including reviewing the state of our cybersecurity, emerging cybersecurity developments and threats, and our strategy to mitigate cybersecurity risks.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Our chief information officer is an active ISC2 accredited member with 16 years of information technology experience,
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 1,748	$ 9,734	$ 14,948

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Defined Contribution Plan - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match	50.00%
Defined contribution plan, employer matching contribution, percent of employees' gross pay	4.00%
Defined contribution plan, cost	$ 867	$ 796	$ 640
Safe Harbor Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contributions per employee, percent	3.00%
Defined contribution plan, employer matching contribution, vesting period	4 years

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Goodwill And Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,117	$ 986	$ 972
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	12 years
Interconnection [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	13 years

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Accrued Liabilities - Summary of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Accrued expenses	$ 3,342	$ 2,701
Payroll and related benefits	2,865	3,401
Royalty	2,962	1,266
Utility	1,588	1,655
Accrued interest	813	962
Other	165	84
Accrued liabilities	$ 11,735	$ 10,069

Segment Information - Summary of Operating Revenue and Significant Expenses, by Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest expense	$ 4,816	$ 5,277	$ 5,753
Income from equity investment	(1,485)	0	0
Corporate and Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Payroll and related expenses	19,152	23,847	20,396
Insurance	4,646	5,488	5,951
Professional and IT fees	4,843	4,141	5,399
Interest expense	4,816	$ 5,276	$ 5,753
Income from equity investment	$ (1,485)

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References + Details

Income Taxes - Schedule of Components of Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current expense:
Federal	$ 0	$ 1,041	$ 1,006
State	44	597	536
Current expense	44	1,638	1,542
Deferred (benefit) expense:
Federal	(4,348)	635	1,869
State	69	170	7
Deferred (benefit) expense	(4,279)	805	1,876
Total income tax (benefit) expense and effective rate	$ (4,235)	$ 2,443	$ 3,418

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details

Leases (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Summary of Supplemental information Related to Operating Lease

Supplemental information related to operating lease arrangements was as follows as of and for the year ended December 31, 2025, 2024 and 2023:


	For The Year Ended December 31,
	2025		2024		2023
Cash paid for amounts included in the measurement of operating lease liabilities	$	3,056	$	922	$	431
Weighted average remaining lease term (in years)		2.80		3.48		5.24
Weighted average discount rate	5.00%-6.00%		5.00%-6.00%			5.00	%

Summary of Future Minimum Operating Lease Payments

Future minimum operating lease payments for the years ending December 31, are as follows:


Year Ending
2026	$	3,662
2027		2,147
2028		1,767
2029		606
2030		618
Thereafter		1,490
Imputed interest		(1,123	)
Total	$	9,167

Summary of Supplemental information Related to Finance Leases

Supplemental information related to finance lease arrangements was as follows:


	For The Year Ended December 31,
	2025		2024		2023
Cash paid for amounts included in the measurement of financing lease liabilities	$	82	$	73	$	79
Weighted average remaining lease term (in years)		2.76		2.02		3.54
Weighted average discount rate	5.00%-6.00%		5.00%-6.00%			5.00	%

Summary of Future Minimum Finance Lease Payments

Future minimum finance lease payments are as follows:


Year Ending
2026	$	32
2027		1
2028		1
2029		1
2030		1
Thereafter		8
Imputed interest		(4	)
Total	$	40

Asset Impairment

12 Months Ended

Dec. 31, 2025

Asset Impairment Charges [Abstract]

Asset Impairment

NOTE 3—ASSET IMPAIRMENT

The Company recorded $3,231, $1,586 and $902 in impairment losses for the years ended December 31, 2025, 2024 and 2023, respectively. In 2025, $2,676 was impaired for costs related to an RNG development project for which the local utility is no longer accepting RNG into its distribution system. All associated costs other than a gas rights development payment related to the project were impaired. The remaining 2025 impairments of $555 were for specifically identified assets deemed obsolete or non-operable and consisted of $432 within the RNG segment, $120 within the REG segment and $3 within the Corporate segment. In 2024, for one of its REG sites, the Company entered into a bill of sale, assignment and assumption agreement to sell its rights to the existing fuel supply agreement and property back to the site host in advance of the fuel supply agreement termination date and received $1,000 in proceeds. The effective date of the sale, assignment and assumption agreement was October 1, 2024. The Company elected to cease operations prior to the assignment date and consequently the remaining book value of long lived assets and intangibles were impaired for $312. The $1,000 in proceeds received was recognized as Other income in the Consolidated Statement of Operations. In addition, $329 in REG impaired assets were due to initial startup testing failures for one of its REG construction work in progress sites. Remaining 2024 impairments, $843 in RNG assets and $102 in REG assets, were for various equipment that was deemed obsolete or inoperable for current operations. 2023 impairments included $777 for specifically identified RNG machinery and feedstock processing equipment that were no longer in operational use and recorded in the Company's RNG segment. The remaining $125 in impairments were for specifically identified obsolete REG critical spares.

Impairment loss was recorded under Operating expenses within the Consolidated Statements of Operations for the years ended December 31, 2025, 2024, and 2023.

Income Taxes

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 14—INCOME TAXES

The Company is subject to income taxes in the U.S. federal jurisdiction and various state and local jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply.


	Year Ended December 31,
	2025			2024		2023
(Loss) income before income taxes:
Domestic	$	(2,444	)	$	12,177	$	18,366
Foreign		(43	)		—		—
	$	(2,487	)	$	12,177	$	18,366

The following table details the components of the Company’s income tax provision for the years ended December 31, 2025, 2024 and 2023:


	Year Ended December 31,
	2025			2024		2023
Current expense:
Federal	$	—		$	1,041	$	1,006
State		44			597		536
	$	44		$	1,638	$	1,542

Deferred (benefit) expense:
Federal	$	(4,348	)	$	635	$	1,869
State		69			170		7
	$	(4,279	)	$	805	$	1,876

Income tax (benefit) expense	$	(4,235	)	$	2,443	$	3,418

The following table illustrates the deferred tax assets and liabilities as of December 31, 2025 and December 31, 2024:


	December 31, 2025			December 31, 2024
Deferred tax assets:
Net operating loss carry forwards	$	4,147		$	4,100
Federal tax credits		17,339			12,274
Book reserves		2,107			1,824
Intangible asset amortization		4,693			5,297
Stock compensation		1,360			1,657
Impairment		990			387
Lease liabilities		2,075			2,815
VIE Loss on investment		565			565
Total deferred tax assets		33,276			28,919
Less: valuation analysis		(4,542	)		(4,542	)
Net deferred tax assets	$	28,734		$	24,377

Deferred tax liabilities:
Property depreciation	$	(21,130	)	$	(20,319	)
Right of use assets		(2,054	)		(2,786	)
Total deferred tax liabilities		(23,184	)		(23,105	)
Net deferred tax assets		5,550			1,272

As of December 31, 2025, the Company has $2,727 (tax affected) of federal net operating losses carryforwards that are not expected to be realizable due to restrictive loss limitation rules. As such a full valuation allowance has been recorded to offset the value of the related carryforward. As of December 31, 2025, the Company has $1,335 state net operating loss carryforwards. A partial valuation allowance has been recorded to recognize that some attributes may expire before utilization. Additionally, the Company has $17,339 of federal tax credit carryforwards that expire 20 years from the date earned. The credits available as of December 31, 2025 will begin to expire in 2039.

The following table details the components of the Company’s income tax provision for the years ended December 31, 2025, 2024 and 2023:


	Year Ended December 31,
	2025					2024					2023
U.S. federal tax at statutory rate	$	(522	)	21	%	$	2,557		21	%	$	3,857		21	%
State and local income taxes, net of federal income tax effect		104		-4	%		642		5	%		430		2	%
Tax credits:
Energy-related tax credits		(4,822	)	194	%		(2,381	)	-20	%		(2,324	)	-13	%
Changes in valuation allowances		—		—			—		—			—		—
Nontaxable or nondeductible items:
Share-based payment awards		1,322		-53	%		1,298		11	%		(175	)	-1	%
Limitation on executive compensation		(343	)	14	%		184		2	%		1,530		8	%
Other		18		-1	%		143		1	%		114		1	%
Changes in unrecognized tax benefits		—		—			—		—			—		—
Other adjustments		8		—			—		—			(14	)	0	%
Total income tax (benefit) expense and effective rate	$	(4,235	)	170	%	$	2,443		20	%	$	3,418		19	%

State taxes in Pennsylvania and Texas comprise the majority of the state and local income taxes, net of federal effect category in all presented years.

As of December 31, 2025, the tax years 2022, 2023 and 2024 are open for examination by the IRS.


	Year Ended December 31,
	2025		2024		2023
Federal:	$	250	$	1,560	$	1,111

State:
California		114		78		20
Idaho		68		—		84
Pennsylvania		107		118		372
Texas		240		235		328
Other		4		2		—
Net cash paid for income taxes	$	783	$	1,993	$	1,915

Valuation Allowance

The Company annually reviews its deferred tax assets for the possibility they will not be realized. A valuation allowance will be recorded if it is determined more than a 50% likelihood exists that a deferred tax asset will not be realized. A $4,542 valuation allowance exists as of December 31, 2025 and 2024, which represents the Company’s deferred tax assets that are not expected to be realized. $565 of the valuation allowance represents MNK's investment deferred tax assets that the Company does not expect to realize. Refer to Note 17, Related Party Transactions for further information regarding the consolidation of MNK on December 31, 2024.

Uncertain Tax Position

The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in both federal and state jurisdictions. ASC 740 states that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of each situation’s technical merits.

At this point in time the Company is not aware of any tax positions taken that would give rise to recording an uncertain tax position. As such, the Company has not recorded any liability for unrecognized tax benefits as of December 31, 2025 or 2024. The Company records interest and penalties as a component of income tax expense. However, as there are no unrecognized tax benefits for the years ended December 31, 2025 and December 31, 2024, the Company has no penalties or interest accrued at December 31, 2025 and 2024, respectively.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Leases

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Leases

NOTE 19—LEASES

The Company leases office space and other office equipment under operating lease arrangements (with initial terms greater than twelve months), expiring in various years through 2033. These leases have been entered into to better enable the Company to conduct business operations. Office space is leased to provide adequate workspace for all employees in Pittsburgh, Pennsylvania and Houston, Texas. Landfill site operating leases include gas monitoring devices that serve to improve production efficiencies and alert technicians to issues and safety concerns occurring at the well head. Office space, office equipment and gas monitoring equipment agreements that exceed 12 months are accounted for as operating leases in accordance with ASC 842, Leases.

The Company also leases safety equipment for the various operational sites in the United States. The term of certain equipment exceeds twelve months and is accordingly classified as a finance lease under ASC 842. The finance leases expire in 2026 and were entered into in order to provide a safe work environment for operational employees.

The Company determines if an arrangement is, or contains, a lease at inception based on whether that contract conveys the right to control the use of an identified asset in exchange for consideration for a period of time. For all operating and finance lease arrangements, the Company presents at the commencement date: a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term.

The Company has elected, as a practical expedient, not to separate non-lease components from lease components, and instead account for each separate component as a single lease component for all lease arrangements, as lessee. In addition, the Company has elected, as a practical expedient, not to apply lease recognition requirements to short-term lease arrangements, generally those with a lease term of less than twelve months for all classes of underlying assets. In determination of the lease term, the Company considers the likelihood of lease renewal options and lease termination provisions.

The Company uses its incremental borrowing rate, as the basis to calculate the present value of future lease payments, at lease commencement. The incremental borrowing rate represents the rate of interest a lessee would have to pay to borrow an amount equal to the total lease payments on a collateralized basis over a similar term in a similar economic environment.

As of December 31, 2025, there were no leases entered into which have not yet commenced and that would entitle the Company to significant rights or create additional obligations. The total lease cost included in our consolidated financial statements of operations for the years ended December 31, 2025, 2024 and 2023 were $3,080, $859, and $695, respectively.

Leases with an initial term of 12 months or less are not recorded on the Consolidated Balance Sheet and the lease expense for those leases is recognized on a straight-line basis. The short-term lease expense for the years ended December 31, 2025, 2024 and 2023 were $3,711, $3,927 and $2,960, respectively.

Supplemental information related to operating lease arrangements was as follows as of and for the year ended December 31, 2025, 2024 and 2023:


	For The Year Ended December 31,
	2025		2024		2023
Cash paid for amounts included in the measurement of operating lease liabilities	$	3,056	$	922	$	431
Weighted average remaining lease term (in years)		2.80		3.48		5.24
Weighted average discount rate	5.00%-6.00%		5.00%-6.00%			5.00	%

Future minimum operating lease payments for the years ending December 31, are as follows:


Year Ending
2026	$	3,662
2027		2,147
2028		1,767
2029		606
2030		618
Thereafter		1,490
Imputed interest		(1,123	)
Total	$	9,167

Supplemental information related to finance lease arrangements was as follows:


	For The Year Ended December 31,
	2025		2024		2023
Cash paid for amounts included in the measurement of financing lease liabilities	$	82	$	73	$	79
Weighted average remaining lease term (in years)		2.76		2.02		3.54
Weighted average discount rate	5.00%-6.00%		5.00%-6.00%			5.00	%

Future minimum finance lease payments are as follows:


Year Ending
2026	$	32
2027		1
2028		1
2029		1
2030		1
Thereafter		8
Imputed interest		(4	)
Total	$	40

Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Payables and Accruals [Abstract]

Summary of Accrued Liabilities

The Company’s accrued liabilities consists of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025		December 31, 2024
Accrued expenses	$	3,342	$	2,701
Payroll and related benefits		2,865		3,401
Royalty		2,962		1,266
Utility		1,588		1,655
Accrued interest		813		962
Other		165		84
Accrued liabilities	$	11,735	$	10,069

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Summary of useful lives of property plant and equipment

The estimated useful lives of the Company’s property, plant and equipment reflect the expected consumption of the economic benefit of these assets as noted in the following table:


Buildings and improvements	5 - 30 years
Machinery and equipment	1 - 43 years
Gas mineral rights	15 - 25 years

Summary of Useful Lives of Intangible Assets Other than Goodwill

The estimated useful lives of separately identified intangible assets are as follows:


Interconnection	10 - 25 years
Customer contracts	2 - 15 years
Emissions allowances	Indefinite
Land use rights	Indefinite

Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2025

Asset Retirement Obligation Disclosure [Abstract]

Summary of Activity Associated with Asset Retirement Obligations

The following table summarizes the activity associated with asset retirement obligations of the Company for the years ended December 31, 2025, 2024 and 2023:


	For The Year Ended December 31,
	2025		2024			2023
Asset retirement obligations—beginning of period	$	6,338	$	5,900		$	5,493
Accretion expense		485		445			407
New asset retirement obligation		137
Changes in estimate	—			218		—
Liabilities associated with properties sold	—			(225	)	—
Asset retirement obligations—end of period	$	6,960	$	6,338		$	5,900

Accounts and Other Receivables (Tables)

12 Months Ended

Dec. 31, 2025

Receivables, Net, Current [Abstract]

Schedule of Accounts and Other Receivables

Accounts and other receivables consist of the following as of December 31, 2025, 2024 and 2023:


	December 31, 2025		December 31, 2024		December 31, 2023
Accounts receivables	$	6,578	$	7,869	$	12,557
Other receivables		2,589		294		148
Reimbursable expenses	—			9		47
Accounts and other receivables, net	$	9,167	$	8,172	$	12,752

Revenues from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Summary of Company's Revenue by Major Source

The following tables display the Company’s disaggregated revenue by major source, based on product type and timing of transfer of goods and services for the years ended December 31, 2025, 2024 and 2023:


	Year Ended December 31, 2025
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	48,530	$	48,530
Natural gas environmental attributes		110,060		—		110,060
Electric commodity		—		10,326		10,326
Electric environmental attributes		7,466		—		7,466
	$	117,526	$	58,856	$	176,382
Operating segment:
RNG	$	110,060	$	48,530	$	158,590
REG		7,466		10,326		17,792
	$	117,526	$	58,856	$	176,382


	Year Ended December 31, 2024
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	35,039	$	35,039
Natural gas environmental attributes		122,463		—		122,463
Electric commodity		—		10,648		10,648
Electric environmental attributes		7,586		—		7,586
	$	130,049	$	45,687	$	175,736
Operating segment:
RNG	$	122,463	$	35,039	$	157,502
REG		7,586		10,648		18,234
	$	130,049	$	45,687	$	175,736


	Year Ended December 31, 2023
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	30,207	$	30,207
Natural gas environmental attributes		125,874		—		125,874
Electric commodity		—		11,301		11,301
Electric environmental attributes		7,522		—		7,522
	$	133,396	$	41,508	$	174,904
Operating segment:
RNG	$	125,874	$	30,207	$	156,081
REG		7,522		11,301		18,823
	$	133,396	$	41,508	$	174,904

Income Taxes - Schedule of the Components of the Company's Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
U.S. federal tax at statutory rate	$ (522)	$ 2,557	$ 3,857
State and local income taxes, net of federal income tax effect	104	642	430
Tax credits:
Energy-related tax credits	(4,822)	(2,381)	(2,324)
Changes in valuation allowances	0	0	0
Nontaxable or nondeductible items:
Share-based payment awards	1,322	1,298	(175)
Limitation on executive compensation	(343)	184	1,530
Other	18	143	114
Changes in unrecognized tax benefits	0	0	0
Other adjustments	8	0	(14)
Total income tax (benefit) expense and effective rate	$ (4,235)	$ 2,443	$ 3,418
Percent
U.S. federal tax at statutory rate percent	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax effect percent	(4.00%)	5.00%	2.00%
Tax credits:
Energy-related tax credits percent	194.00%	(20.00%)	(13.00%)
Changes in valuation allowances percent	0.00%	0.00%	0.00%
Nontaxable or nondeductible items:
Share-based payment awards percent	(53.00%)	11.00%	(1.00%)
Limitation on executive compensation percent	14.00%	2.00%	8.00%
Other percent	(1.00%)	1.00%	1.00%
Changed in unrecognized tax benefits percent	0.00%	0.00%	0.00%
Other adjustments percent	0.00%	0.00%	0.00%
Total income tax (benefit) expense and effective rate percent	170.00%	20.00%	19.00%

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Commitments and Contingencies

12 Months Ended

Dec. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 20—COMMITMENTS AND CONTINGENCIES

Concentrations

A substantial portion of the Company’s revenues are generated from five locations in 2025, 2024, and 2023, each in separate areas of the country. For the years ended December 31, 2025, 2024 and 2023, 68%, 69% and 68%, respectively, of operating revenues were derived from these locations. In addition, five customers make up 77% and 76% of trade receivables as of December 31, 2025 and December 31, 2024, respectively.

Environmental

The Company is subject to a variety of environmental laws and regulations governing discharges to the air and water, as well as the handling, storage and disposing of hazardous or waste materials. The Company believes its operations currently comply in all material respects with all environmental laws and regulations applicable to its business. However, there can be no assurance that environmental requirements will not change in the future or that the Company will not incur significant costs to comply with such requirements.

Contingencies

The Company, from time to time, may be involved in litigation. At December 31, 2025, management does not believe there are any matters outstanding that would have a material adverse effect on the Company’s financial position or results of operations.

Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2025

Derivative Instrument Detail [Abstract]

Summary of cash gains/losses and non-cash gains/losses

As a result of the economic hedging strategies employed, the Company had the following interest expense in the Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


		For The Year Ended December 31,
Derivative Instrument	Location	2025			2024			2023
Interest rate swaps	Interest expense		(549	)		(486	)		(560	)
Net loss		$	(549	)	$	(486	)	$	(560	)

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Summary of Fair Value of MRI EICP Options and Valuation Assumptions

The fair value of the MRI EICP options was estimated using the Black-Scholes option pricing model with the following weighted-average assumptions (no dividends were expected):



	April 2023 Awards
Options awarded		2,100,000
Risk-free interest rate	3.71%-3.97%
Expected volatility	78%-80%
Expected option life (in years)	3.5-5.5
Grant-date fair value	$	4.25

	January 2021 Awards
Options awarded		950,214
Risk-free interest rate	0.5%
Expected volatility	32%
Expected option life (in years)		5.5
Grant-date fair value	$	3.44

Summary of Outstanding Activity of Options, Restricted Stock and Restricted Stock Units under MRI EICP

The following table summarizes the restricted shares, restricted stock units and options outstanding under the MRI EICP for the years ended December 31, 2025, 2024 and 2023:



	Restricted Shares					Restricted Stock Units					Options
	Number of shares			Weighted Average Grant Date Fair Value		Number of shares			Weighted Average Grant Date Fair Value		Number of shares			Weighted Average Exercise Price
End of period - December 31, 2023		1,638,678		$	11.91		150,000		$	10.09		2,325,000		$	7.04
Beginning of period - January 1, 2024		1,638,678		$	11.91		150,000		$	10.09		2,325,000		$	7.04
Granted		—			—		80,000			4.41		—			—
Vested		(1,012,570	)		11.89		(60,000	)		9.49		—			—
End of period - Balance at December 31, 2024		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04

End of period - December 31, 2024		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04
Beginning of period - January 1, 2025		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04
Granted		—		—			80,000			1.77		—			—
Vested		(626,108	)		11.93		(120,000	)		6.60		—			—
Forfeited		—			—		—			—		(225,000	)		9.57
End of period - December 31, 2025		—		$	—		130,000		$	4.97		2,100,000		$	6.77

Segment Information

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Segment Information

NOTE 18—SEGMENT INFORMATION

The Company’s reportable segments for the years ended December 31, 2025, 2024 and 2023 are Renewable Natural Gas and Renewable Electricity Generation. Renewable Natural Gas includes the production of RNG. Renewable Electricity Generation includes generation of electricity at biogas-to-electricity plants. The Corporate entity is not determined to be an operating segment and though not an operating segment, certain corporate costs are disclosed as reconciling items to the Company’s consolidated results. The following tables are consistent with the manner in which the Chief Executive Officer, who is the Company's chief operating decision maker ("CODM"), evaluates the performance of each segment and allocates the Company's resources. The CODM evaluates the performance of the segments based on segment operating income (loss). The Company maintains discrete financial information for its operating sites, which meet the definition of an operating segment, but are aggregated into reportable segments based on the type of commodity produced, as these operating sites have similar economic characteristics, including production processes, customer types and regulatory environments. Total Assets and Capital expenditures by segment are also provided within the tables below, as these

amounts are regularly reviewed by the CODM. “RNG” refers to Renewable Natural Gas and “REG” refers to Renewable Electricity Generation.


For The Year Ended December 31, 2025
	RNG		REG			Total
Operating segment revenue	$	155,736	$	17,231		$	172,967

Corporate and other revenue							3,415
Total consolidated revenue						$	176,382

Less (1)
Payroll and related expenses		9,242		3,143			12,385
Wellfield operating and maintenance		7,220		3,035			10,255
Plant expense		2,276		1,501			3,777
Waste disposal		2,415		161			2,576
Preventative maintenance		15,045		3,189			18,234
Breakdown expenses		2,069		1,368			3,437
Utility expense		16,376		514			16,890
Royalties, transportation, gathering and production fuel		30,986		1,959			32,945
Depreciation, depletion and amortization		24,377		5,332			29,709
Impairment		3,107		120			3,227
Other operating expenses (2)		4,450		1,779			6,229
Operating segment expenses	$	117,563	$	22,101		$	139,664

Corporate and other operating expenses (3)							35,866
Total consolidated operating expenses						$	175,530

Operating segment income (loss)	$	38,173	$	(4,870	)	$	33,303

Corporate and other operating loss							(32,451	)
Total consolidated operating income						$	852

Operating segment other expenses	$	15	$	50		$	65
Corporate and other expenses (4)							3,274
Total consolidated other expenses						$	3,339

Operating segment income (loss) before income taxes	$	38,158	$	(4,920	)	$	33,238

Corporate and other loss before income taxes							(35,725	)
Total consolidated loss before income taxes						$	(2,487	)

Operating segment assets	$	201,056	$	192,152		$	393,208
Corporate and other assets							42,252
Total consolidated assets						$	435,460

Operating segment capital expenditures	$	38,693	$	77,618		$	116,311
Corporate and other capital expenditures							231
Total consolidated capital expenditures						$	116,542

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $19,152, insurance of $4,646 and professional and IT fees of $4,843.

(4) The majority of other expense (income) for Corporate and other are interest expense of $4,816 and income from equity investment of ($1,485).


For The Year Ended December 31, 2024
	RNG			REG			Total
Operating segment revenue	$	157,983		$	17,753		$	175,736

Corporate and other revenue								-
Total consolidated revenue							$	175,736

Less (1)
Payroll and related expenses		8,516			2,226			10,742
Wellfield operating and maintenance		5,104			3,537			8,641
Plant expense		2,262			1,133			3,395
Waste disposal		2,353			54			2,407
Preventative maintenance		13,677			3,607			17,284
Breakdown expenses		1,736			469			2,205
Utility expense		15,571			310			15,881
Royalties, transportation, gathering and production fuel		29,529			1,973			31,502
Depreciation, depletion and amortization		18,192			5,099			23,291
Impairment		843			743			1,586
Other operating expenses (2)		4,168			1,425			5,593
Operating segment expenses	$	101,951		$	20,576		$	122,527

Corporate and other operating expenses (3)								37,086
Total consolidated operating expenses							$	159,613

Operating segment income (loss)	$	56,032		$	(2,823	)	$	53,209

Corporate and other operating loss								(37,086	)
Total consolidated operating income							$	16,123

Operating segment other income	$	(32	)	$	(1,010	)	$	(1,042	)
Corporate and other expenses (4)								4,988
Total consolidated other expenses							$	3,946

Operating segment income (loss) before income taxes	$	56,064		$	(1,813	)	$	54,251

Corporate and other loss before income taxes								(42,074	)
Total consolidated income before income taxes							$	12,177

Operating segment assets	$	187,438		$	107,519		$	294,957
Corporate and other assets								54,058
Total consolidated assets							$	349,015

Operating segment capital expenditures	$	25,403		$	36,280		$	61,683
Corporate and other capital expenditures								640
Total consolidated capital expenditures							$	62,323

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $23,847, insurance of $5,488 and professional and IT fees of $4,141.

(4) The majority of other expense (income) for Corporate and other is interest expense of $5,276.


For The Year Ended December 31, 2023
	RNG		REG			Total
Operating segment revenue	$	156,455	$	18,449		$	174,904

Corporate and other revenue							-
Total consolidated revenue						$	174,904

Less (1)
Payroll and related expenses		7,620		1,850			9,470
Wellfield operating and maintenance		3,659		2,080			5,739
Plant expense		2,874		806			3,680
Waste disposal		2,103		24			2,127
Preventative maintenance		10,202		3,822			14,024
Breakdown expenses		2,711		832			3,543
Utility expense		15,168		579			15,747
Royalties, transportation, gathering and production fuel		32,876		1,985			34,861
Depreciation, depletion and amortization		15,720		5,193			20,913
Impairment		777		125			902
Other operating expenses (2)		3,458		1,749			5,207
Operating segment expenses	$	97,168	$	19,045		$	116,213

Corporate and other operating expenses (3)							35,051
Total consolidated operating expenses						$	151,264

Operating segment income (loss)	$	59,287	$	(596	)	$	58,691

Corporate and other operating loss							(35,051	)
Total consolidated operating income						$	23,640

Operating segment other expenses (income)	$	16	$	(24	)	$	(8	)
Corporate and other expenses (4)							5,282
Total consolidated other expenses						$	5,274

Operating segment income (loss) before income taxes	$	59,271	$	(572	)	$	58,699

Corporate and other loss before income taxes							(40,333	)
Total consolidated income before income taxes						$	18,366

Operating segment assets	$	176,951	$	73,369		$	250,320
Corporate and other assets							99,918
Total consolidated assets						$	350,238

Operating segment capital expenditures	$	41,325	$	21,682		$	63,007
Corporate and other capital expenditures							84
Total consolidated capital expenditures						$	63,091

(1) Significant expenses regularly reviewed by the CODM.

(2) The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.

(3) The majority of operating expenses for Corporate and other are payroll and related expenses of $20,396, insurance of $5,951 and professional and IT fees of $5,399.

(4) The majority of other expense (income) for Corporate and other is interest expense of $5,753.

For the years ended December 31, 2025, 2024 and 2023, two, four and three customers, respectively, made up greater than 10% of our total revenues.


	Year Ended December 31, 2025
	RNG			REG		Corporate		Total

Customer A		17.4	%		—		—		17.4	%
Customer B		11.3	%		—		—		11.3	%

	Year Ended December 31, 2024
	RNG			REG		Corporate		Total
Customer A		17.6	%		—		—		17.6	%
Customer B		15.7	%		—		—		15.7	%
Customer C		13.8	%		—		—		13.8	%
Customer D		11.8	%		—		—		11.8	%

	Year Ended December 31, 2023
	RNG			REG		Corporate		Total
Customer A		22.0	%		—		—		22.0	%
Customer B		11.7	%		—		—		11.7	%
Customer C		11.7	%		—		—		11.7	%

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Segment Information - Summary of Revenue by Major Customers (Detail) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	17.40%	17.60%	22.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.30%	15.70%	11.70%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		13.80%	11.70%
Customer D [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		11.80%
RNG [Member] \| Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	17.40%	17.60%	22.00%
RNG [Member] \| Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.30%	15.70%	11.70%
RNG [Member] \| Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		13.80%	11.70%
RNG [Member] \| Customer D [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		11.80%

Goodwill And Intangible Assets, Net - Schedule of Goodwill and Intangible Assets (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Interconnection [Member]
Schedule Of Intangible Assets And Goodwill [Line Items]
Finite lived intangible assets accumulated amortization	$ 5,344	$ 4,593
Customer Contracts [Member]
Schedule Of Intangible Assets And Goodwill [Line Items]
Finite lived intangible assets accumulated amortization	$ 17,841	$ 17,476

Asset Retirement Obligations - Summary of Activity Associated with Asset Retirement Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]
Asset retirement obligations - beginning of period	$ 6,338	$ 5,900	$ 5,493
Accretion expense	485	445	407
New asset retirement obligation	137
Changes in estimate	0	218	0
Liabilities associated with properties sold	0	(225)	0
Asset retirement obligations - end of period	$ 6,960	$ 6,338	$ 5,900

Debt

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Debt

NOTE 13—DEBT

On March 9, 2026, the Company refinanced its entire debt maturing in December 2026 with a New Senior Credit Facility with a new lender. Under ASC 470-10-45-14 guidance, the Company classified its existing debt as $2,733 as short term debt and $126,000 as long term debt as of December 31, 2025. Please refer to Note 22 – Subsequent Events for further discussion.

The Company’s debt consists of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025			December 31, 2024
Term loans	$	44,000		$	56,000
Revolver		85,000		—
Less: current principal maturities		(3,000	)		(12,000	)
Less: debt issuance costs (on long-term debt)	—				(237	)
Long-term debt	$	126,000		$	43,763
Current portion of long-term debt		2,733			11,853
Total debt	$	128,733		$	55,616

Amended Credit Agreement

On December 12, 2018, Montauk Energy Holdings LLC (“MEH”) entered into the Second Amended and Restated Revolving Credit and Term Loan Agreement (as amended, “Credit Agreement”), by and among MEH, the financial institutions from time to time party thereto as lenders and Comerica Bank, as the administrative agent, sole lead arranger and sole bookrunner (“Comerica”). The Credit Agreement (i) amended and restated in its entirety MEH’s prior revolving credit and term loan facility, dated as of August 4, 2017, as amended, with Comerica and certain other financial institutions and (ii) replaced in its entirety the prior credit agreement, dated as of August 4, 2017, as amended, between Comerica and Bowerman Power LFG, LLC, a wholly-owned subsidiary of MEH.

On March 21, 2019, MEH entered into the first amendment to the Credit Agreement which clarified a variety of terms, definitions and calculations in the Credit Agreement. The Credit Agreement requires the Company to maintain customary affirmative and negative covenants, including certain financial covenants, which are measured at the end of each fiscal quarter.

On August 28, 2019, the Company received a temporary waiver for an anticipated Event of Default (as defined in the Credit Agreement) for the consecutive three-month period ended on August 31, 2019 (the “Specified Event of Default”). The Specified Event of Default was waived through October 1, 2019.

On September 12, 2019, the Company entered into the second amendment to the Credit Agreement (the "Second Amendment"). Among other matters, the Second Amendment redefined the Fixed Charge Coverage Ratio (as defined in the Credit Agreement), reduced the commitments under the revolving credit facility to $80,000, redefined the Total Leverage Ratio (as defined in the Credit Agreement) and eliminated the RIN Floor (as defined in the Second Amendment) as an Event of Default. In connection with the

Second Amendment, the Company paid down the outstanding term loan by $38,250 and the resulting quarterly principal installments were reduced to $2,500

On January 4, 2021, the Company, Montauk Holdings Limited (“MNK”) and Montauk Holdings USA, LLC (a direct wholly-owned subsidiary of MNK at the time, “Montauk USA”) entered into a series of transactions, including an equity exchange and a distribution collectively referred to as the “Reorganization Transactions,” that resulted in the Company owning all of the assets and entities (other than Montauk USA) previously owned by Montauk USA, and Montauk Renewables became a direct wholly-owned subsidiary of MNK. In connection with the completion of the Reorganization Transactions and the IPO, the Company entered into the third amendment to the Credit Agreement (the “Third Amendment”). This amendment permitted the change of control provisions, as defined in the underlying agreement, to permit the Reorganization Transactions and the IPO to be completed.

On December 21, 2021, MEH entered into the Fourth Amendment to the Second Amended and Restated Revolving Credit and Term Loan Agreement. The current credit agreement, which is secured by a lien on substantially all assets of the Company and certain of its subsidiaries, provides for a $80,000 term loan and a $120,000 revolving credit facility. The term loan amortizes in quarterly installments of $2,000 through 2024, then increases to $3,000 from 2025 to 2026 with a final payment of $32,000 in late 2026.

The Company accounted for the Fourth amendment as both a debt modification and debt extinguishment in accordance with ASC 470, Debt (“ASC 470”). In connection with the Credit Agreement, the Company paid $2,027 in fees. Of this amount, $326 was expensed and $1,701 was capitalized and will be amortized over the life of the Credit Agreement. Amortized debt issuance expense in the amount of $391, $360 and $367 for the years ended December 31, 2025, 2024 and 2023, respectively, was recorded in interest expense in the Consolidated Statement of Operations. Unamortized debt issuance cost on the revolver was $601 and $479 as of December 31, 2025 and 2024, respectively.

On November 8, 2024, MEH entered into the Fifth Amendment to the Second Amended and Restated Revolving Credit and Term Loan Agreement. The Fifth amendment replaced the Bloomberg Short-Term Bank Yield Index Rate utilized for interest rates with the Secured Overnight Financing Rate Index ("SOFR"), plus applicable margin.

On December 31, 2025, MEH entered into the Sixth Amendment to the Second Amended and Restated Revolving Credit and Term Loan Agreement. The Sixth Amendment redefined the Total Net Leverage Ratio and accelerated the presentment of monthly unaudited financial statements to Comerica, along with the requirement of an engineering study and independent engineer's certificate as it relates to operations in North Carolina by June 3, 2026. As part of the Sixth Amendment, the Company was required to pay $515 to Comerica and the bank syndicate. Of this amount, $120 was expensed and the remainder amount was capitalized and will be amortized over the life of the Credit Agreement.

As of December 31, 2025, $44,000 and $85,000 was outstanding under the term loan and revolver, respectively. In addition, the Company had $2,571of outstanding letters of credit as of December 31, 2025. Amounts available under the revolving credit facility are reduced by any amounts outstanding under letters of credit. As of December 31, 2025, the Company’s capacity available for borrowing under the revolving credit facility was $32,429. Borrowings of the term loan and revolving credit facility bear interest at the Secured Overnight Financing Rate plus an applicable margin. Interest rates as of December 31, 2025 and 2024 were 6.44% and 6.01%, respectively.

As of December 31, 2025, the Company was in compliance with all applicable debt covenants related to the Credit Agreement with Comerica Bank. Please refer to Note 22 – Subsequent Events for discussion of the New Senior Credit Facility that the Company entered into on March 9, 2026.

Annual Maturities of Long-Term Debt

The following is a summary of annual principal maturities of long-term debt as of December 31, 2025:


Year ending	Amount
2026		129,000
Total	$	129,000

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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+ Details

Leases - Summary of Future Minimum Finance Lease Payments (Detail) $ in Thousands	Dec. 31, 2025 USD ($)
Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
2026	$ 32
2027	1
2028	1
2029	1
2030	1
Thereafter	8
Imputed interest	(4)
Total	$ 40

Goodwill And Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Goodwill and Intangible assets consist of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025		December 31, 2024
Goodwill	$	60	$	60
Intangible assets with indefinite lives:
Land use rights		230		230
Total intangible assets with indefinite lives:	$	230	$	230
Intangible assets with finite lives:
Interconnection, net of accumulated amortization of $5,344 and $4,593	$	13,972	$	14,614
Customer contracts, net of accumulated amortization of $17,841 and $17,476		5,343		3,209
Total intangible assets with finite lives:	$	19,315	$	17,823
Total Goodwill and Intangible assets	$	19,605	$	18,113

Summary of finite-lived intangible assets future amortization expense

Amortization expense for customer contracts and interconnections for the next five years is as follows:


	Customer		Inter-
Year ending	Contracts		connections
2026	$	427	$	751
2027		427		751
2028		427		751
2029		427		751
2030		427		751
Thereafter		3,208		10,217

Goodwill And Intangible Assets, Net - Summary of finite-lived intangible assets future amortization expense (Detail) $ in Thousands	Dec. 31, 2024 USD ($)
Customer Contracts [Member]
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2026	$ 427
2027	427
2028	427
2029	427
2030	427
Thereafter	3,208
Interconnection [Member]
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2026	751
2027	751
2028	751
2029	751
2030	751
Thereafter	$ 10,217

Description of Business - Additional Information (Detail) $ / shares in Units, $ in Thousands					12 Months Ended
	Mar. 02, 2025 shares	Jun. 21, 2023 shares	Dec. 22, 2022 shares	Jan. 26, 2021 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) shares
Organization, Consolidation and Presentation of Financial Statements [Line items]
Number of years of experience					30 years
Number of current operations					13
Percent of greenhouse gas reduction requirement					60.00%
Sale of stock, Number of shares issued in transaction \| shares				2,702,500
Sale of stock, price per share \| $ / shares				$ 8.5
Sale of stock, Consideration received on transaction				$ 22,971
Principal amount of loan				$ 10,690
Debt instrument collateral shares \| shares	976,623	976,623	800,000
Mnk [Member]
Organization, Consolidation and Presentation of Financial Statements [Line items]
Investment in subsidiaries elimination in consolidation					$ 10,178
Common Stock [Member] \| Mnk [Member]
Organization, Consolidation and Presentation of Financial Statements [Line items]
Debt instrument collateral shares \| shares					976,623
Treasury Stock [Member] \| Mnk [Member]
Organization, Consolidation and Presentation of Financial Statements [Line items]
Debt Conversion, Converted Instrument, Amount					$ 8,309

Accounts and Other Receivables

12 Months Ended

Dec. 31, 2025

Receivables, Net, Current [Abstract]

Accounts and Other Receivables

NOTE 6—ACCOUNTS AND OTHER RECEIVABLES

The Company extends credit based upon an evaluation of the customer’s financial condition. Credit terms are consistent with industry standards and practices. Accounts Receivable consist of sales to large creditworthy energy and utility companies. Reserves for uncollectible accounts, if any, are recorded as part of general and administrative expenses in the Consolidated Statements of Operations. No reserve expense was recorded for the years ended December 31, 2025, 2024 and 2023.

Accounts and other receivables consist of the following as of December 31, 2025, 2024 and 2023:


	December 31, 2025		December 31, 2024		December 31, 2023
Accounts receivables	$	6,578	$	7,869	$	12,557
Other receivables		2,589		294		148
Reimbursable expenses	—			9		47
Accounts and other receivables, net	$	9,167	$	8,172	$	12,752

Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Summary of Company Debt

The Company’s debt consists of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025			December 31, 2024
Term loans	$	44,000		$	56,000
Revolver		85,000		—
Less: current principal maturities		(3,000	)		(12,000	)
Less: debt issuance costs (on long-term debt)	—				(237	)
Long-term debt	$	126,000		$	43,763
Current portion of long-term debt		2,733			11,853
Total debt	$	128,733		$	55,616

Summary of annual principal maturities of long-term debt

The following is a summary of annual principal maturities of long-term debt as of December 31, 2025:


Year ending	Amount
2026		129,000
Total	$	129,000

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Reference 5: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
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-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

Property, Plant and Equipment, Net - Summary of Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 561,119	$ 444,771
Less: Accumulated depreciation and amortization	(219,724)	(192,483)
Property, Plant & Equipment, Net	341,395	252,288
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,568	1,568
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	38,914	36,434
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	321,834	275,692
Gas mineral rights [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	35,526	35,526
Construction work in progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 163,277	$ 95,551

Asset Impairment - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) Numbers	Dec. 31, 2023 USD ($)
Asset Impairment Charges [Line Items]
Impairment loss	$ 3,231	$ 1,586	$ 902
Proceeds received	1,000
Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	555
Renewable Electricity Generation Site [Member]
Asset Impairment Charges [Line Items]
Impairment loss		312	125
Proceeds received		$ 1,000
Number of operating sites \| Numbers		1
Renewable Electricity Generation Site [Member] \| Construction work in progress [Member]
Asset Impairment Charges [Line Items]
Impairment loss	329
Renewable Electricity Generation Site [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	120
Renewable Electricity Generation Site [Member] \| Inventory Valuation and Obsolescence [Member]
Asset Impairment Charges [Line Items]
Impairment loss		$ 102
Renewable Natural Gas [Member]
Asset Impairment Charges [Line Items]
Impairment loss			$ 777
Renewable Natural Gas [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	2,676
Renewable Natural Gas [Member] \| Customer Contracts [Member]
Asset Impairment Charges [Line Items]
Impairment loss	432
Renewable Natural Gas [Member] \| Inventory Valuation and Obsolescence [Member]
Asset Impairment Charges [Line Items]
Impairment loss		$ 843
Corporate Segment and Other Operating Segment [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	$ 3

Accounts and Other Receivables - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Receivables, Net, Current [Abstract]
Provision for accounts receivable and credit loss expense	$ 0	$ 0	$ 0

Summary of Significant Accounting Policies - Summary of Useful Lives of Property Plant and Equipment (Detail)	Dec. 31, 2025
Buildings and improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	5 years
Buildings and improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	30 years
Machinery and equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	1 year
Machinery and equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	43 years
Gas mineral rights [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	15 years
Gas mineral rights [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and equipment, Useful life	25 years

Equity Method Investments

12 Months Ended

Dec. 31, 2025

Investments, All Other Investments [Abstract]

Equity Method Investments

NOTE 5—EQUITY METHOD INVESTMENTS

In March 2025, the Company entered into a joint venture, GreenWave Energy Partners, LLC, ("GreenWave"). The investees in the joint venture are Pesta Energy, LLC, a wholly owned subsidiary of the Company, with an ownership percentage of 51% and Pioneer Renewable Energy Marketing, LLC ("PREM"), with an ownership percentage of 49%. Although the Company holds a 51%

ownership interest, GreenWave is jointly controlled by each party, and no single entity has the unilateral ability to direct the activities that most significantly impact GreenWave’s economic performance; accordingly, consolidation is not required. As of December 31, 2025, the Company has contributed $4,000. Additionally, the Company provided for a $167 short-term loan. Subject to various and certain requirements as defined in the underlying agreements, the Company could be required to make additional short term loans up to $333. Any additional funding, if required, would be evaluated at the time of funding to determine the appropriate accounting treatment. The joint venture is primarily intended to help address the limited capacity of RNG usage in transportation by dispensing RNG through expanded Transportation Fuel uses under the RFS. While the joint venture is not expected to use RNG produced by the Company, it is expected to provide access to exclusive unique and proprietary pathways for other industry producers of RNG. PREM facilitates access to these pathways and the Company provides for the efficient RIN separation for the joint venture. As part of the agreement, the Company receives separated RINs as distributions. For the year ended December 31, 2025, the Company received 706 RINs with a distribution value of $1,661. The distributions of separated RINs are accounted for as a return on investment and are recognized based on the Company’s share of GreenWave’s earnings, with any excess distributions treated as a return of investment and recorded as a reduction of the carrying amount of the equity method investment. For the year ended December 31, 2025, the Company recorded $1,485 in income from the joint venture. As of December 31, 2025, the Company had a non-consolidated equity method investment of $3,824.

The Company utilizes the equity method of accounting related to this joint venture. Refer to Note 2 – Summary of
Significant Accounting Policies.

Leases - Summary of Supplemental information Related to Operating Lease (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lessor, Lease, Description [Line Items]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 3,056	$ 922	$ 431
Weighted average remaining lease term (in years)	2 years 9 months 18 days	3 years 5 months 23 days	5 years 2 months 26 days
Weighted average discount rate			5.00%
Minimum [Member]
Lessor, Lease, Description [Line Items]
Weighted average discount rate	5.00%	5.00%
Maximum [Member]
Lessor, Lease, Description [Line Items]
Weighted average discount rate	6.00%	6.00%

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 31, 2025	Mar. 06, 2026	Jun. 30, 2025
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Registrant Name	MONTAUK RENEWABLES, INC.
Securities Act File Number	001-39919
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Entity Tax Identification Number	85-3189583
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Address, Address Line One	5313 Campbells Run Road
Entity Address, Address Line Two	Suite 200
Entity Address, State or Province	PA
Entity Address, City or Town	Pittsburgh
Entity Address, Postal Zip Code	15205
City Area Code	412
Local Phone Number	747-8700
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MNTK
Security Exchange Name	NASDAQ
ICFR Auditor Attestation Flag	false
Entity Common Stock, Shares Outstanding		142,341,139
Entity Central Index Key	0001826600
Entity Ex Transition Period	false
Entity Public Float			$ 102,481,143
Document Financial Statement Error Correction [Flag]	false
Documents Incorporated by Reference [Text Block]	DOCUMENTS INCORPORATED BY REFERENCE The information required by Part III of this Annual Report on Form 10-K, to the extent not set forth herein, is incorporated herein by reference from the registrant’s definitive proxy statement relating to the registrant’s Annual Meeting of Shareholders to be held in 2026 (the “Proxy Statement”), which definitive proxy statement shall be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year to which this report relates.
Auditor Name	GRANT THORNTON LLP
Auditor Firm ID	248
Auditor Location	Pittsburgh, Pennsylvania
Auditor Opinion [Text Block]	Opinion on the financial statements We have audited the accompanying consolidated balance sheets of Montauk Renewables, Inc. (a Delaware corporation) and subsidiaries (the “Company”) as of December 31, 2025 and 2024, the related consolidated statements of operations, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America.

Income Per Share (Tables)

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Income Per Share

Basic and diluted income per share was computed using the following common share data for the years ended December 31, 2025, 2024 and 2023, respectively:


	For The Year Ended December 31,
	2025		2024		2023
Net income	$	1,748	$	9,734	$	14,948
Basic weighted-average shares outstanding		143,020,271		142,279,079		141,727,905
Dilutive effect of share-based awards		55,820		118,414		423,735
Diluted weighted-average shares outstanding		143,076,091		142,397,493		142,151,640
Basic income per share	$	0.01	$	0.07	$	0.11
Diluted income per share	$	0.01	$	0.07	$	0.11

Goodwill And Intangible Assets, Net

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill And Intangible Assets, Net

NOTE 8—GOODWILL AND INTANGIBLE ASSETS, NET

Goodwill and Intangible assets consist of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025		December 31, 2024
Goodwill	$	60	$	60
Intangible assets with indefinite lives:
Land use rights		230		230
Total intangible assets with indefinite lives:	$	230	$	230
Intangible assets with finite lives:
Interconnection, net of accumulated amortization of $5,344 and $4,593	$	13,972	$	14,614
Customer contracts, net of accumulated amortization of $17,841 and $17,476		5,343		3,209
Total intangible assets with finite lives:	$	19,315	$	17,823
Total Goodwill and Intangible assets	$	19,605	$	18,113

The weighted average remaining useful life of the customer contracts and interconnections are approximately 12 and 13 years, respectively. Amortization expense was $1,117, $986 and $972 for the years ended December 31, 2025, 2024 and 2023, respectively.

Amortization expense for customer contracts and interconnections for the next five years is as follows:


	Customer		Inter-
Year ending	Contracts		connections
2026	$	427	$	751
2027		427		751
2028		427		751
2029		427		751
2030		427		751
Thereafter		3,208		10,217

Share-Based Compensation - Summary of Outstanding Activity of Options,Restricted Stock and Restricted Stock Units under MRI EICP (Detail) - MRI EICP [Member] - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Restricted Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Shares, Beginning of period	626,108	1,638,678
Number of Shares, Granted	0	0
Number of Shares, Vested	(626,108)	(1,012,570)
Number of Shares, Forfeited	0
Number of Shares, End of period	0	626,108
Weighted Average Grant Date Fair Value, Beginning of period	$ 11.93	$ 11.91
Weighted Average Grant Date Fair Value, Granted	0	0
Weighted Average Grant Date Fair Value, Vested	11.93	11.89
Weighted Average Grant Date Fair Value, Forfeited	0
Weighted Average Grant Date Fair Value, End of period	$ 0	$ 11.93
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Shares, Beginning of period	170,000	150,000
Number of Shares, Granted	80,000	80,000
Number of Shares, Vested	(120,000)	(60,000)
Number of Shares, Forfeited	0
Number of Shares, End of period	130,000	170,000
Weighted Average Grant Date Fair Value, Beginning of period	$ 7.63	$ 10.09
Weighted Average Grant Date Fair Value, Granted	1.77	4.41
Weighted Average Grant Date Fair Value, Vested	6.6	9.49
Weighted Average Grant Date Fair Value, Forfeited	0
Weighted Average Grant Date Fair Value, End of period	$ 4.97	$ 7.63
Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Shares, Beginning of period	2,325,000	2,325,000
Number of Shares, Granted	0	0
Number of Shares, Vested	0	0
Number of Shares, Forfeited	(225,000)
Number of Shares, End of period	2,100,000	2,325,000
Weighted Average Grant Date Fair Value, Beginning of period	$ 7.04	$ 7.04
Weighted Average Grant Date Fair Value, Granted	0	0
Weighted Average Grant Date Fair Value, Vested	0	0
Weighted Average Grant Date Fair Value, Forfeited	9.57
Weighted Average Grant Date Fair Value, End of period	$ 6.77	$ 7.04

Summary of Significant Accounting Policies - Additional Information (Detail) Numbers in Millions	12 Months Ended
	Dec. 31, 2025 ReportableSegments Numbers	Dec. 31, 2024 Numbers
Accounting Policies [Line Items]
Number of reportable segments \| ReportableSegments	2
Renewable identification numbers unsold \| Numbers	0.0	6.8

Accrued Liabilities

12 Months Ended

Dec. 31, 2025

Payables and Accruals [Abstract]

Accrued Liabilities

NOTE 12—ACCRUED LIABILITIES

The Company’s accrued liabilities consists of the following as of December 31, 2025 and December 31, 2024:


	December 31, 2025		December 31, 2024
Accrued expenses	$	3,342	$	2,701
Payroll and related benefits		2,865		3,401
Royalty		2,962		1,266
Utility		1,588		1,655
Accrued interest		813		962
Other		165		84
Accrued liabilities	$	11,735	$	10,069

Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The Company’s assets and liabilities that are measured at fair value on a recurring basis include the following as of December 31, 2025 and 2024, set forth by level, within the fair value hierarchy:


	December 31, 2025
	Level 1		Level 2		Level 3			Total
Interest rate swap derivative asset	$	—	$	220	$	—		$	220
Asset retirement obligations		—		—		(6,960	)		(6,960	)
	$	—	$	220	$	(6,960	)	$	(6,740	)


	December 31, 2024
	Level 1		Level 2		Level 3			Total
Interest rate swap derivative asset	$	—	$	769	$	—		$	769
Asset retirement obligations		—		—		(6,338	)		(6,338	)
Pico earn-out liability		—		—		(3,406	)		(3,406	)
	$	—	$	769	$	(9,744	)	$	(8,975	)

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Summary of Income Taxes in the U.S. Federal Jurisdiction and Various State and Local Jurisdictions


	Year Ended December 31,
	2025			2024		2023
(Loss) income before income taxes:
Domestic	$	(2,444	)	$	12,177	$	18,366
Foreign		(43	)		—		—
	$	(2,487	)	$	12,177	$	18,366

Schedule of Components of Income Tax Provision

The following table details the components of the Company’s income tax provision for the years ended December 31, 2025, 2024 and 2023:


	Year Ended December 31,
	2025			2024		2023
Current expense:
Federal	$	—		$	1,041	$	1,006
State		44			597		536
	$	44		$	1,638	$	1,542

Deferred (benefit) expense:
Federal	$	(4,348	)	$	635	$	1,869
State		69			170		7
	$	(4,279	)	$	805	$	1,876

Income tax (benefit) expense	$	(4,235	)	$	2,443	$	3,418

The following table details the components of the Company’s income tax provision for the years ended December 31, 2025, 2024 and 2023:


	Year Ended December 31,
	2025					2024					2023
U.S. federal tax at statutory rate	$	(522	)	21	%	$	2,557		21	%	$	3,857		21	%
State and local income taxes, net of federal income tax effect		104		-4	%		642		5	%		430		2	%
Tax credits:
Energy-related tax credits		(4,822	)	194	%		(2,381	)	-20	%		(2,324	)	-13	%
Changes in valuation allowances		—		—			—		—			—		—
Nontaxable or nondeductible items:
Share-based payment awards		1,322		-53	%		1,298		11	%		(175	)	-1	%
Limitation on executive compensation		(343	)	14	%		184		2	%		1,530		8	%
Other		18		-1	%		143		1	%		114		1	%
Changes in unrecognized tax benefits		—		—			—		—			—		—
Other adjustments		8		—			—		—			(14	)	0	%
Total income tax (benefit) expense and effective rate	$	(4,235	)	170	%	$	2,443		20	%	$	3,418		19	%

Schedule Of Deferred Tax Assets And Liabilities

The following table illustrates the deferred tax assets and liabilities as of December 31, 2025 and December 31, 2024:


	December 31, 2025			December 31, 2024
Deferred tax assets:
Net operating loss carry forwards	$	4,147		$	4,100
Federal tax credits		17,339			12,274
Book reserves		2,107			1,824
Intangible asset amortization		4,693			5,297
Stock compensation		1,360			1,657
Impairment		990			387
Lease liabilities		2,075			2,815
VIE Loss on investment		565			565
Total deferred tax assets		33,276			28,919
Less: valuation analysis		(4,542	)		(4,542	)
Net deferred tax assets	$	28,734		$	24,377

Deferred tax liabilities:
Property depreciation	$	(21,130	)	$	(20,319	)
Right of use assets		(2,054	)		(2,786	)
Total deferred tax liabilities		(23,184	)		(23,105	)
Net deferred tax assets		5,550			1,272

Schedule of Net Income Tax Paid


	Year Ended December 31,
	2025		2024		2023
Federal:	$	250	$	1,560	$	1,111

State:
California		114		78		20
Idaho		68		—		84
Pennsylvania		107		118		372
Texas		240		235		328
Other		4		2		—
Net cash paid for income taxes	$	783	$	1,993	$	1,915

Leases - Summary of Future Minimum Operating Lease Payments (Detail) $ in Thousands	Dec. 31, 2025 USD ($)
Leases [Abstract]
2026	$ 3,662
2027	2,147
2028	1,767
2029	606
2030	618
Therafter	1,490
Imputed interest	(1,123)
Total	$ 9,167

Asset Retirement Obligations

12 Months Ended

Dec. 31, 2025

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

NOTE 9—ASSET RETIREMENT OBLIGATIONS

The Company accounts for asset retirement obligations by recording the fair value of the liability in the period in which it is incurred. The Company estimates the fair value of asset retirement obligations by calculating the estimated present value of the cost to retire the asset. Factors that are considered when determining the present value of the cost to retire the asset include future inflation and discount rates, along with estimates date(s) of retiring the asset. Additionally, changes in legal, regulatory, environmental, and political environments can affect the fair value of the obligations. As such, asset retirement obligations are considered a level 3 financial instrument.

The 2025 $137 ARO addition was due an RNG expansion project placed into service. The $218 change in estimates for the year ended December 31, 2024 was due to RNG fuel supply agreement extensions and an RNG project that necessitated reassessment. The $225 reduction in the liability was due to an REG site sale as described in Note 3.

The following table summarizes the activity associated with asset retirement obligations of the Company for the years ended December 31, 2025, 2024 and 2023:


	For The Year Ended December 31,
	2025		2024			2023
Asset retirement obligations—beginning of period	$	6,338	$	5,900		$	5,493
Accretion expense		485		445			407
New asset retirement obligation		137
Changes in estimate	—			218		—
Liabilities associated with properties sold	—			(225	)	—
Asset retirement obligations—end of period	$	6,960	$	6,338		$	5,900

Income Per Share

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Income Per Share

Note 21—INCOME PER SHARE

Basic and diluted income per share was computed using the following common share data for the years ended December 31, 2025, 2024 and 2023, respectively:


	For The Year Ended December 31,
	2025		2024		2023
Net income	$	1,748	$	9,734	$	14,948
Basic weighted-average shares outstanding		143,020,271		142,279,079		141,727,905
Dilutive effect of share-based awards		55,820		118,414		423,735
Diluted weighted-average shares outstanding		143,076,091		142,397,493		142,151,640
Basic income per share	$	0.01	$	0.07	$	0.11
Diluted income per share	$	0.01	$	0.07	$	0.11

Commitment and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer Benchmark [Member] \| Geographic Concentration Risk [Member] \| Five Geographical Locations [Member]
Loss Contingencies [Line Items]
Revenue Performance obligation satisfied to segments, Percentage	68.00%	69.00%	68.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Five Customers [Member]
Loss Contingencies [Line Items]
Revenue Performance obligation satisfied to segments, Percentage	77.00%	76.00%

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483359/720-20-50-1

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 27
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482395/460-10-55-27

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

+ Details

Description of Business

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

NOTE 1—DESCRIPTION OF BUSINESS

Operations and organization

Montauk Renewables’ Business

Montauk Renewables, Inc. (the “Company” or “Montauk Renewables”) is a renewable energy company specializing in the management, recovery and conversion of biogas into Renewable Natural Gas (“RNG”). The Company captures methane, preventing it from being released into the atmosphere, and converts it into either RNG or electrical power for the electrical grid (“Renewable Electricity”). The Company, headquartered in Pittsburgh, Pennsylvania, has more than 30 years of experience in the development, operation and management of landfill methane-fueled renewable energy projects. The Company has current operations at 13 operating projects located in California, Idaho, Ohio, Oklahoma, Pennsylvania, North Carolina and Texas. The Company sells RNG and Renewable Electricity, taking advantage of Environmental Attribute premiums available under federal and state policies that incentivize their use.

Two of the Company’s key revenue drivers are sales of captured gas and sales of Renewable Identification Numbers (“RINs”) to fuel blenders. The Renewable Fuel Standard (“RFS”) is an Environmental Protection Agency (“EPA”) administered federal law that requires transportation fuel to contain a minimum volume of renewable fuel. RNG derived from landfill methane, agricultural digesters and wastewater treatment facilities used as a vehicle fuel qualifies as a D3 (cellulosic biofuel with a 60% greenhouse gas reduction requirement) RIN. The RINs are compliance units for fuel blenders that were created by the RFS program in order to reduce greenhouse gases and imported petroleum into the United States.

An additional program utilized by the Company is the Low Carbon Fuel Standard (“LCFS”). This is state specific and is designed to stimulate the use of low-carbon fuels. To the extent that RNG from the Company’s facilities is used as a transportation fuel in states that have adopted an LCFS program, it is eligible to receive an Environmental Attribute additional to the RIN value under the federal RFS.

Another key revenue driver is the sale of captured electricity and the associated environmental premiums related to renewable sales. The Company’s electric facilities are designed to conform to and monetize various state renewable portfolio standards requiring a percentage of the electricity produced in that state to come from a renewable resource. Such premiums are in the form of Renewable Energy Credits (“RECs”). The Company’s largest electric facility, located in California, receives revenue for the monetization of RECs as a part of a purchase power agreement.

Collectively, the Company benefits from federal and state government incentives in the United States, provided in the form of RINs, RECs, LCFS credits, tax credits and other incentives to end users, distributors, system integrators and manufacturers of renewable energy projects, that promote the use of renewable energy, as Environmental Attributes.

Background and Reorganization Transactions

On January 4, 2021, the Company, Montauk Holdings Limited (“MNK”) and Montauk Holdings USA, LLC (a direct wholly-owned subsidiary of MNK at the time, “Montauk USA”) entered into a series of transactions, including an equity exchange and a distribution collectively referred to as the “Reorganization Transactions,” that resulted in the Company owning all of the assets and entities (other than Montauk USA) previously owned by Montauk USA, and Montauk Renewables became a direct wholly-owned subsidiary of MNK. Prior to the Reorganization Transactions, MNK’s business and operations were conducted entirely through Montauk USA and its U.S. subsidiaries, and MNK held no substantial assets other than equity of Montauk USA. The Company had no significant operations or assets prior to January 4, 2021 when it engaged in the equity exchange with Montauk USA and MNK.

After completion of the Reorganization Transactions, (i) Montauk USA ceased to own any substantial assets and (ii) all entities through which MNK’s business and operations were conducted became owned, directly or indirectly, by the Company. MNK adopted a plan contemporaneously with the completion of the Reorganization Transactions that authorized the liquidation and dissolution of MNK.

On January 15, 2021, MNK sold the membership interest of Montauk USA to a third party. On January 26, 2021, MNK distributed all of the outstanding shares of the Company’s common stock as a pro rata dividend to the holders of MNK’s ordinary shares (the “Distribution”), subject to any tax withholding obligations under applicable South African law. Each ordinary share of MNK outstanding on January 21, 2021, the record date for the Distribution (the “Record Date”), entitled the holder thereof to receive one share of the Company’s common stock.

On January 26, 2021, the Company closed the initial public offering of its common stock on the Nasdaq Capital Market (the “IPO”) with the shares traded under the symbol “MNTK”. Montauk Renewables issued 2,702,500 shares at $8.50 per share and received gross proceeds of $22,971. The Company’s common stock was also secondarily listed on the Johannesburg Stock Exchange (“JSE”) under the trading symbol “MKR”.

On January 26, 2021, the Company entered into a Loan Agreement and Secured Promissory Note (as amended on February 22, 2021, December 22, 2021, December 22, 2022, December 27, 2023 and March 5, 2025) with MNK pursuant to which the Company advanced a cash loan to MNK for MNK to pay its dividends tax liability arising from the Reorganization Transactions under the South African Income Tax Act, 1962 (Act No. 58 of 1962), as amended. The terms of the loan following the amendments are substantially similar to the initial loan agreement and were primarily entered into to (1) increase the principal amount outstanding under the loan to $10,690 in the aggregate (2) extended the maturity date to December 31, 2033 also, in accordance with Montauk Renewables’ obligations set forth in the Transaction Implementation Agreement ("TIA"). This loan became due on December 31, 2024 (“Maturity Date”) when MNK and RP47 did not extend the maturity of the loan agreement. Associated with a modification on December 31, 2024 of the TIA between us and MNK, we became obligated to repay the RP47 Loan on MNK’s behalf as MNK did not have sufficient funds to repay the RP47 Loan. On February 2, 2025, our Board of Directors approved the repayment of the RP47 Loan under the TIA. On March 5, 2025 and in connection with the Fifth Amended and Restated Loan Agreement and Secured Promissory Note", the Company repaid the RP47 loan as required under the TIA. In connection with the modification under the TIA, RP47 retained its power over MNK but no longer held significant benefits in MNK. Substantially all of MNK’s activities are conducted on our behalf as MNK’s only asset is the 976,623 shares of our common stock held as security for the Fifth Amended and Restated Loan Agreement and Secured Promissory Note. MNK’s only obligation was its loan to us and thus, we became the primary beneficiary of MNK on December 31, 2024. The Fifth Amended Promissory Note became an intercompany loan and was eliminated in consolidation. MNK’s investment of $10,178 in the Company was also eliminated in consolidation. There was no gain or loss on the initial consolidation of MNK as the transaction was a common control transaction. We also recorded a noncash acquisition of Treasury Stock ($8,309) related to the consolidation of the 976,623 shares of our Common Stock collateralizing the Fifth Amended Promissory Note. MNK is currently an affiliate of the Company and certain of the Company’s directors are also directors of MNK. See Note 17 for more information.

MNK was delisted from the JSE on January 26, 2021. The MNK Board of Directors and Shareholders held its annual general meeting in March 2023 and voted to take MNK private.

Asset Retirement Obligations - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Asset Retirement Obligation [Line Items]
Changes in estimate	$ 0	$ 218	$ 0
Asset retirement obligation	137
Liabilities associated with properties sold	0	$ 225	$ 0
RNG [Member]
Asset Retirement Obligation [Line Items]
Changes in estimate	218
Asset retirement obligation	137
REG [Member]
Asset Retirement Obligation [Line Items]
Liabilities associated with properties sold	$ 225

Share-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands			12 Months Ended
	May 31, 2022 USD ($)	Jan. 31, 2021 $ / shares shares	Dec. 31, 2025 USD ($) Employees shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation			$ 4,444	$ 9,959	$ 8,318
General and Administrative Expense [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Non cash stock compensation expense			1,550	2,911
MRI EICP [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Common stock shares withheld \| shares		950,214
Exercise price of common stock \| $ / shares		$ 11.38
Stock-based compensation			$ 2,945
Unrecognised compensation expense recognised, Period			2 years 3 months 18 days
Non-Qualified Stock Options [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation			$ 1,869	2,629	1,692
Restricted Stock [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation			$ 718	1,470	1,723
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee \| shares			1,250,000
Number of employees \| Employees			2
Time Based Restricted Stock Awards [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation			$ 1,862	$ 5,866	$ 4,908
Share-Based compensation arrangement by share-Based payment award, equity instruments other than options, revalued amount	$ 15,500

Segment Information - Additional Information (Detail)	12 Months Ended
Segment Information - Additional Information (Detail)	Dec. 31, 2025
Segment Reporting [Abstract]
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CODM evaluates the performance of the segments based on segment operating income (loss).

Summary of Significant Accounting Policies - Summary of Useful Lives of Intangible Assets Other than Goodwill (Detail)	12 Months Ended
	Dec. 31, 2025
Land Use Rights [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Useful lives of intangible assets other than goodwill	Indefinite
Interconnection [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	13 years
Interconnection [Member] \| Minimum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	10 years
Interconnection [Member] \| Maximum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	25 years
Customer Contracts [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	12 years
Customer Contracts [Member] \| Minimum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	2 years
Customer Contracts [Member] \| Maximum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Intangible asset useful life	15 years
Emission Allowances [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [LineItems]
Useful lives of intangible assets other than goodwill	Indefinite

Derivative Instruments - Summary of cash gains/losses and non-cash gains/losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Net loss	$ (549)	$ (486)	$ (560)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Income (Loss)	Net Income (Loss)	Net Income (Loss)
Interest rate swap [Member]
Derivative [Line Items]
Net loss	$ (549)	$ (486)	$ (560)

Revenues from Contracts with Customers - Additional Information (Detail) - Revenue from Contract with Customer, Product and Service Benchmark [Member]	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goods transferred over time [Member] \| Renewable Natural Gas and Renewable Electricity Generation [Member] \| Customer Concentration Risk [Member] \| Renewable Energy [Member]
Disaggregation of Revenue [Line Items]
Revenue Performance obligation satisfied to segments, Percentage	33.00%	26.00%	24.00%
Goods transferred at a point in time [Member] \| Product Concentration Risk [Member] \| Electric Environmental Attributes [Member]
Disaggregation of Revenue [Line Items]
Revenue Performance obligation satisfied to segments, Percentage	67.00%	74.00%	76.00%

Revenues from Contracts with Customers - Summary of Company's Revenue by Major Source (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 176,382	$ 175,736	$ 174,904
RNG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	158,590	157,502	156,081
REG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	17,792	18,234	18,823
Natural Gas Commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	48,530	35,039	30,207
Natural Gas Environmental Attributes [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	110,060	122,463	125,874
Electric Commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	10,326	10,648	11,301
Electric Environmental Attributes [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,466	7,586	7,522
Goods transferred at a point in time [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	117,526	130,049	133,396
Goods transferred at a point in time [Member] \| RNG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	110,060	122,463	125,874
Goods transferred at a point in time [Member] \| REG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,466	7,586	7,522
Goods transferred at a point in time [Member] \| Natural Gas Commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Goods transferred at a point in time [Member] \| Natural Gas Environmental Attributes [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	110,060	122,463	125,874
Goods transferred at a point in time [Member] \| Electric Environmental Attributes [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,466	7,586	7,522
Goods transferred over time [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	58,856	45,687	41,508
Goods transferred over time [Member] \| RNG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	48,530	35,039	30,207
Goods transferred over time [Member] \| REG [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	10,326	10,648	11,301
Goods transferred over time [Member] \| Natural Gas Commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	48,530	35,039	30,207
Goods transferred over time [Member] \| Electric Commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 10,326	$ 10,648	$ 11,301

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 23,752	$ 45,621
Accounts and other receivables	9,167	8,172
Current restricted cash	8	8
Income tax receivable	702	41
Current portion of derivative instruments	220	471
Prepaid insurance and other current assets	3,306	2,911
Total current assets	37,155	57,224
Non-current restricted cash	430	375
Property, plant and equipment, net	341,395	252,288
Goodwill and intangible assets, net	19,605	18,113
Deferred tax assets	5,550	1,272
Non-current portion of derivative instruments	0	298
Operating lease right-of-use assets	9,082	7,064
Finance lease right-of-use assets	39	110
Equity method investment	3,824	0
Other assets	18,380	12,271
Total assets	435,460	349,015
Current liabilities:
Accounts payable	15,638	8,856
Accrued liabilities	11,735	10,069
Related party payable	0	625
Current portion of operating lease liability	3,287	2,049
Current portion of finance lease liability	32	76
Current portion of long-term debt	2,733	11,853
Total current liabilities	33,425	33,528
Long-term debt, less current portion	126,000	43,763
Non-current portion of operating lease liability	5,880	5,138
Non-current portion of finance lease liability	8	36
Asset retirement obligations	6,960	6,338
Other liabilities	39	2,795
Total liabilities	172,312	91,598
Commitments and contingencies (Note 20)
STOCKHOLDERS' EQUITY
Common stock, $0.01 par value, authorized 690,000,000 shares; 143,912,811 and 143,792,811 shares issued at December 31, 2025 and December 31, 2024, respectively; 143,244,544 and 142,711,797 shares outstanding at December 31, 2025 and December 31, 2024, respectively	1,431	1,426
Treasury stock, at cost, 2,521,886 and 2,308,524 shares December 31, 2025 and December 31, 2024, respectively	(21,681)	(21,262)
Additional paid-in capital	226,302	221,905
Retained earnings	57,096	55,348
Total stockholders' equity	263,148	257,417
Total liabilities and stockholders' equity	$ 435,460	$ 349,015

Accounts and Other Receivables - Schedule of Accounts and Other Receivables (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Receivables, Net, Current [Abstract]
Accounts receivables	$ 6,578	$ 7,869	$ 12,557
Other receivables	2,589	294	148
Reimbursable expenses	0	9	47
Accounts and other receivables, net	$ 9,167	$ 8,172	$ 12,752

Fair Value of Financial Instruments - Additional Information (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) StandardCubicFeetPerMinute	Dec. 31, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, transfers from Level 1 to Level 3 \| $	$ 0	$ 0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout payments \| $	$ 4,000,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Undiscounted maximum earnout percentage	5.00%
Average inlet gas production \| StandardCubicFeetPerMinute	641
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Undiscounted maximum earnout percentage	20.00%
Average inlet gas production \| StandardCubicFeetPerMinute	944

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Total operating revenues	$ 176,382	$ 175,736	$ 174,904
Operating expenses:
Operating and maintenance expenses	77,646	66,663	59,762
General and administrative expenses	31,736	36,286	34,403
Royalties, transportation, gathering and production fuel	32,945	31,502	34,861
Depreciation, depletion and amortization	29,972	23,515	21,158
Impairment loss	3,231	1,586	902
Transaction costs	0	61	178
Total operating expenses	175,530	159,613	151,264
Operating income (loss)	852	16,123	23,640
Other expenses (income):
Interest expense	4,816	5,277	5,753
Income from equity investment	(1,485)	0	0
Other income	8	(1,331)	(479)
Total other expenses	3,339	3,946	5,274
Income (loss) before income taxes	(2,487)	12,177	18,366
Income tax (benefit) expense	(4,235)	2,443	3,418
Net (loss) income	$ 1,748	$ 9,734	$ 14,948
(Loss) income per share:
Basic	$ 0.01	$ 0.07	$ 0.11
Diluted	$ 0.01	$ 0.07	$ 0.11
Weighted-average common shares outstanding:
Basic	143,020,271	142,279,079	141,727,905
Diluted	143,076,091	142,397,493	142,151,640

Revenues from Contracts with Customers

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Revenues from Contracts with Customers

NOTE 4—REVENUES FROM CONTRACTS WITH CUSTOMERS

The Company’s revenues are comprised of renewable energy and related Environmental Attribute sales provided under short, medium and long term contracts with its customers. All revenue is recognized when (or as) the Company satisfies its performance obligation(s) under the contract (either implicit or explicit) by transferring the promised product or service to its customer either when (or as) its customer obtains control of the product or service. A performance obligation is a promise in a contract to transfer a distinct product or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation. The Company allocates the contract’s transaction price to each performance obligation using the product’s observable market standalone selling price for each distinct product in the contract. The Company's typical invoicing terms are payment due within 30 days.

Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products or services to customers. Revenue is recorded net of allowances and customer discounts. Transportation and gathering costs incurred by customers after the transfer of control of the commodities are netted from revenue, as the Company does not control these services and acts as an agent with respect to such costs. To the extent applicable, sales, value add and other taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis. In certain cases, the Company's performance obligation under its sale of RNG contracts include variable components, whose consideration is based on subsequent monetization of environmental attribute credits by third parties. These variable components are recognized over time to the extent it is probable that a significant reversal will not occur.

The Company’s performance obligations related to the sale of renewable energy (i.e. RNG and Renewable Electricity) are generally satisfied over time. Revenue related to the sale of renewable energy is generally recognized over time using an output based upon the product quantity delivered to the customer. This measure is used to best depict the Company’s performance to date under the terms of the contract. Revenue from products transferred to customers over time accounted for 33%, 26% and 24% of revenue for the years ended December 31, 2025, 2024 and 2023, respectively.

The Company’s performance obligations related to the sale of Environmental Attributes are generally satisfied at a point in time and were 67%, 74% and 76% of revenue for the years ended December 31, 2025, 2024 and 2023, respectively. The Company recognizes Environmental Attribute revenue at the point in time in which the customer obtains control of the Environmental Attributes, which is generally when the title of the Environmental Attribute passes to the customer upon delivery. In limited cases, title does not transfer to the customer and revenue is not recognized until the customer has accepted the Environmental Attributes.


	Year Ended December 31, 2025
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	48,530	$	48,530
Natural gas environmental attributes		110,060		—		110,060
Electric commodity		—		10,326		10,326
Electric environmental attributes		7,466		—		7,466
	$	117,526	$	58,856	$	176,382
Operating segment:
RNG	$	110,060	$	48,530	$	158,590
REG		7,466		10,326		17,792
	$	117,526	$	58,856	$	176,382


	Year Ended December 31, 2024
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	35,039	$	35,039
Natural gas environmental attributes		122,463		—		122,463
Electric commodity		—		10,648		10,648
Electric environmental attributes		7,586		—		7,586
	$	130,049	$	45,687	$	175,736
Operating segment:
RNG	$	122,463	$	35,039	$	157,502
REG		7,586		10,648		18,234
	$	130,049	$	45,687	$	175,736


	Year Ended December 31, 2023
	Goods transferred at a point in time		Goods transferred over time		Total
Major goods/Service line:
Natural gas commodity	$	—	$	30,207	$	30,207
Natural gas environmental attributes		125,874		—		125,874
Electric commodity		—		11,301		11,301
Electric environmental attributes		7,522		—		7,522
	$	133,396	$	41,508	$	174,904
Operating segment:
RNG	$	125,874	$	30,207	$	156,081
REG		7,522		11,301		18,823
	$	133,396	$	41,508	$	174,904

Practical expedients and remaining performance obligations

The Company recognizes the sale of natural gas and electric commodities using the right to invoice practical expedient. The Company determined that the revenues recognized as of period end correspond directly with the value transferred to customers and the Company's satisfaction of the performance obligations to date. Furthermore, with the application of the right to invoice practical expedient and in consideration that contracts related to future environmental attributes sales do not exceed one year, there are no remaining unsatisfied or partially satisfied performance obligations as of December 31, 2025.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

Income Taxes - Summary of Income Taxes in the U.S. Federal Jurisdiction and Various State and Local Jurisdictions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Domestic	$ (2,444)	$ 12,177	$ 18,366
Foreign	(43)	0	0
Income (loss) before income taxes	$ (2,487)	$ 12,177	$ 18,366

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Income Taxes - Schedule of Net Income Tax Paid (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
Federal:	$ 250	$ 1,560	$ 1,111
Net cash paid for income taxes	783	1,993	1,915
California [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
State:	114	78	20
Idaho [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
State:	68	0	84
Pennsylvania [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
State:	107	118	372
Texas [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
State:	240	235	328
Other [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
State:	$ 4	$ 2	$ 0

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 2—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The historical consolidated financial information included reflects the historical results of operations and financial position of Montauk USA through January 4, 2021 when MNK sold the membership interest of Montauk USA. The consolidated financial statements of Montauk USA became the Company’s historical financial statements following the IPO. Certain historical financial information included relates to periods prior to the Reorganization Transactions. On December 31, 2024, the Company re-assessed its determination of the primary beneficiary of the Variable Interest Entity ("VIE") MNK under the guidance in ASC 810, Consolidation. Refer to Note 17 – Related Parties for further information. All intercompany balances and transactions have been eliminated in consolidation.

The Company utilizes the equity method of accounting for companies where its ownership is greater than 50% and significant but controlling interest does not exist.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period financial statement presentation. These
reclassifications had no effect on the previously reported total assets, total liabilities, stockholders’ equity, results of operations or cash
flows.

Segment Reporting

The Company reports segment information in two segments: RNG and Renewable Electricity Generation. This is consistent with the internal reporting provided to the chief operating decision maker who evaluates operating results and performance. The aforementioned business services and offerings described in Note 1 are defined by management as two distinct operating segments: RNG and Renewable Electricity Generation. Below is a description of the Company’s operating segments and other activities.

The RNG segment represents the sale of gas sold at fixed-price contracts, counterparty share RNG volumes and applicable Environmental Attributes. This business unit represents the majority of the revenues generated by the Company. The Renewable

Electricity Generation segment represents the sale of captured electricity and applicable Environmental Attributes. Corporate & Other relates to additional discrete financial information for the corporate function. It is primarily used as a shared service center for maintaining functions such as executive, accounting, treasury, legal, human resources, tax, environmental, engineering and other operations functions not otherwise allocated to a segment. As such, the corporate entity is not determined to be an operating segment but is discretely disclosed for purposes of reconciliation to the Company’s consolidated financial statements.

Use of Estimates

The preparation of financial statements, in conformity with accounting principles generally accepted in the United States (“GAAP”), requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Cash, Cash Equivalents and Restricted Cash

Cash and cash equivalents include highly liquid investments with maturity dates of three months or less from the date of purchase and are recorded at cost. The Company may hold cash in excess of federally insured limits. Restricted cash is classified as current or non-current based on the terms of the underlying agreements and represents cash held as deposits, cash held in escrow and cash collateral for financial letters of credit.

Accounts and Other Receivables

Accounts and other receivables on the Consolidated Balance Sheets represent outstanding billings for goods and services delivered to customers on an unsecured basis as well as reimbursable expenses. In evaluating its allowance for doubtful accounts for accounts receivable, the Company performs ongoing reviews of its outstanding receivables to determine if any amounts are uncollectible and adjusts the allowance for doubtful accounts accordingly.

Property, Plant and Equipment

Property, plant and equipment purchases are stated at cost, except for asset retirement obligations, which are recorded at estimated fair value at inception date. Depreciation and amortization are based on costs less estimated salvage values, primarily using the straight-line method over the estimated useful lives or, if applicable, the term of the related gas rights agreements or power purchase agreements, whichever is shorter. Maintenance and repairs are expensed as incurred. Major improvements that extend the useful lives of property are capitalized.

The estimated useful lives of the Company’s property, plant and equipment reflect the expected consumption of the economic benefit of these assets as noted in the following table:


Buildings and improvements	5 - 30 years
Machinery and equipment	1 - 43 years
Gas mineral rights	15 - 25 years

Goodwill and Intangible Assets

Goodwill is the cost of an acquisition less the fair value of the identified net assets of the acquired business.

Separately identifiable intangible assets are recorded at their fair values upon acquisition. The Company accounts for its intangible assets in accordance with ASC 350, Intangibles—Goodwill and Other (“ASC 350”). Finite-lived intangible assets include interconnections, customer contracts and trade names & trademarks. The interconnection intangible asset is the exclusive right to utilize an interconnection line between the operating plant and a utility substation to transmit produced natural gas and electricity. Included in that right is full maintenance provided on this line by the utility. Intangible assets with finite useful lives are amortized on a straight-line basis over their estimated useful life as depicted in the chart below. Indefinite intangible assets are not amortized and include emission allowances and land use rights.

The estimated useful lives of separately identified intangible assets are as follows:


Interconnection	10 - 25 years
Customer contracts	2 - 15 years
Emissions allowances	Indefinite
Land use rights	Indefinite

Leases

The Company assesses leases in accordance with ASU 2016-02, Leases, (“ASU 2016-02”). This ASU requires lessees to recognize a right-of-use asset and lease liability on the Consolidated Balance Sheet for leases classified as either operating or finance leases. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize a right-of-use asset and lease liability. Additionally, when measuring assets and liabilities arising from a lease, optional payments should be included only if the lessee is reasonably certain to exercise an option to extend the lease, exercise a purchase option, or not exercise an option to terminate the lease. A right-of-use asset represents an entity’s right to use the underlying asset for the lease term, and a lease liability represents an entity’s obligation to make lease payments. The measurement, recognition and presentation of expenses and cash flows arising from leases by a lessee remains the same. The Company has included further lease disclosures in Note 19.

Long-lived Asset Impairment

In accordance with ASC 360, Property, plant, equipment and intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by comparing the carrying amount of an asset or asset group to future undiscounted cash flows expected to be generated by the asset or asset group. Such estimates are based on certain assumptions, which are subject to uncertainty and may materially differ from actual results. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.

A summary of impairment losses on tangible and intangible assets for the year ended December 31, 2025, 2024 and 2023 is included in Note 3.

Indefinite-Lived Asset Impairment

Indefinite-lived intangible assets are required to be evaluated for impairment at least annually or whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The evaluation of impairment under ASC 350 requires the use of projections, estimates and assumptions as to the future performance of the Company’s operations, including anticipated future revenues, expected operating costs and the discount factor used. Actual results may differ from projections. If such indefinite-lived assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.

Asset Retirement Obligations

The Company accounts for asset retirement obligations as required under ASC 410, Asset Retirement and Environmental Obligations, (“ASC 410”). ASC 410 requires the fair value of a liability for an asset retirement obligation be recognized in the period in which the legal obligation arises, with the associated discounted asset retirement costs being capitalized as a part of the carrying amount of the long-lived asset and the annual accretion expense recorded in operations. The Company has recorded in the consolidated financial statements estimates for asset retirement obligations related to the decommissioning and removal requirements for specific gas processing and distribution assets, as required by their associated gas rights agreements.

Revenue

The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”). Revenue from the Company’s point in time product sales is recognized when products are transferred, or services are invoiced and control transferred. Revenue from the Company’s product and service sales provided under long-term agreements is recognized as the Company transfers control of the product or renders service to its customers, which approximates the time when the customer is invoiced. The Company has presented the disclosures required by ASC 606 in Note 4.

Income Taxes

The Company is treated as a corporation for income tax purposes. Therefore, income taxes are accounted for under the liability method on a consolidated basis by the Company and its consolidated subsidiaries in accordance with ASC 740, Income Taxes (“ASC 740”). Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws. The provision for income taxes includes federal and state income taxes.

The Company recognizes the financial statement benefit of a tax position only after determining the relevant tax authority would more-likely-than-not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the consolidated financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense.

Derivative Instruments

The Company applies the provisions of ASC 815, Derivatives and Hedging, (“ASC 815”). ASC 815 requires each derivative instrument to be recorded in the Consolidated Balance Sheets at its fair value. Changes in a derivative instrument’s fair value are recognized currently in earnings.

Fair Value of Financial Instruments

The Company employs varying methods and assumptions in estimating the fair value of each class of financial instruments for which it is practical to estimate fair value. For cash and cash equivalents, receivables and payables, the carrying amounts approximate fair value due to the short maturity of these instruments. For long-term debt, the carrying amounts approximate fair value as the interest rates obtained by the Company approximate the prevailing interest rates available to the Company for similar instruments.

In accordance with ASC 820, Fair Value Measurement (“ASC 820”), a hierarchy is established which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The hierarchy defines three levels of inputs that may be used to measure fair value:

Level 1—Unadjusted quoted prices in active markets for identical unrestricted assets and liabilities that the reporting entity has the ability to access at the measurement date.

Level 2—Inputs other than quoted prices included within Level 1 that are observable for the assets and liabilities or can be corroborated with observable market data for substantially the entire contractual term of the assets or liabilities.

Level 3—Unobservable inputs that reflect the entity’s own assumptions about the assumptions market participants would use in the pricing of the assets or liabilities and are consequently not based on market activity but rather through particular valuation techniques. The Company uses the fair value methodology to value the assets and liabilities recorded at fair value, including the Company’s asset retirement obligations and earn out liability.

The values of the Level 2 interest rate derivatives were determined using a model, which incorporates market inputs including the implied forward interest rate yield curve for the same period as the future interest rate swap settlement. The Company has also considered both its own credit risk and counterparty credit risk in determining fair value and determined these adjustments were insignificant for the years ended December 31, 2025 and 2024. The Company’s asset retirement obligations are recorded at fair value at the time the liability is incurred if a reasonable estimate of fair value can be made. Fair value is determined by calculating the estimated present value of the cost to retire the asset as determined by qualified engineers, based on currently available information and inflation estimates and is considered a Level 3 measurement. The Company’s earn-out liability fair value is determined by calculating the estimated present value of future obligations based on currently available information and the discount factor used and is considered a Level 3 measurement.

A summary of changes in the fair values of the Company’s Level 3 instruments, attributable to asset retirement obligations and the earn out liability, for the years ended December 31, 2025 and 2024 is included in Note 11.

Renewable Identification Numbers (“RINs”)

The Company generates D3 RINs through its production and sale of RNG used for transportation purposes as prescribed under the Federal Renewable Fuel Standard. The RINs that the Company generates as government incentives through its renewable operating projects can be separated and sold as credits independent from the energy produced and not a result of physical attributes of the Company’s production. Therefore, no cost is allocated to the RIN when it is generated. Revenue is recognized on these

Environmental Attributes when there is an agreement in place to monetize the credits at an agreed upon price with a customer and transfer of control has occurred. Realized prices for Environmental Attributes monetized in a year may not correspond directly to index prices due to the forward selling of commitments. The Company had zero and 6.8 million RINs generated and unsold as of December 31, 2025 and 2024, respectively.

Renewable Energy Credits (“RECs”)

The Company generates RECs through its production and sale of landfill methane into renewable electric energy as prescribed by the State of California Renewables Portfolio Standard or the EPA. The RECs that the Company generates as government incentives through its renewable operating projects are able to be separated and sold as credits independent from the electricity produced and not a result of physical attributes of the Company’s production. Therefore, no cost is allocated to the REC when it is generated. Revenue is recognized on these Environmental Attributes when there is an agreement in place to monetize the credits at an agreed upon price with a customer and transfer of control has occurred.

Equity-Based Compensation

The Company accounts for equity-based compensation under the provisions of ASC 718, Compensation—Stock Compensation, (“ASC 718”). ASC 718 requires compensation costs related to share-based payment transactions, measured based on the fair value of the instruments issued, be recognized in the consolidated financial statements over the requisite service period of the award. Stock options are initially measured on the grant date using the Black-Scholes valuation model, which requires the use of subjective assumptions related to the expected stock price volatility, term, risk-free interest rate and dividend yield. For restricted stock shares, the Company determines the grant date fair value based on the closing market price of the stock on the date of the grant. Forfeitures are recognized when they occur.

Employee Benefits

Leave entitlement

Employee entitlements to annual leave are recognized when they accrue to employees. An accrual is made for the estimated liability to the employees for annual leave up to the financial year end date. This liability is included in “Accrued liabilities” in the Consolidated Balance Sheets.

Bonus Plans

The Company recognizes a liability and an expense for incentive compensation bonuses awarded based on the achievement of Company and personnel goals where contractually obliged or where there is a past practice that has created a constructive obligation. An accrual is maintained for the appropriate proportion of the expected bonuses which would become payable at year end.

Recently Adopted Accounting Standards

In December 2025, the FASB issued ASU No. 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): derivatives scope refinements and scope clarification for share-based noncash consideration from a customer in a revenue contract. This ASU (1) refines the scope of the guidance on derivatives in ASC 815 (Issue 1) and (2) clarifies the guidance on share-based payments from a customer in ASC 606 (Issue 2). The Company has adopted the standard retrospectively, as of December 31, 2025.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in 2023-09 aim to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 is effective for the Company's Annual Report on Form 10-K for the year ended December 31, 2025, with early adoption permitted. The Company has adopted the standard retrospectively, and the enhanced expense disclosures can be found in Note 14.

Recently Issued Accounting Standards

In November 2024, the FASB issued ASU 2024-03, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This ASU requires public business entities to disclose, on an annual and interim basis, disaggregated information about certain income statement expense line items. The ASU also requires disclosure of the total amount of selling expenses recognized in continuing operations on an annual and interim basis and disclosure of a public business entity’s definition of selling expenses on an annual basis (or in interim reporting periods if the definition is changed). Public business entities are required to apply the guidance prospectively but are permitted to apply it retrospectively. The ASU is effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. The Company is currently evaluating the impact of this standard on its consolidated financial statements.

Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Lease Cost	$ 3,080	$ 859	$ 695
Short term lease expense	$ 3,711	$ 3,927	$ 2,960

Fair Value of Financial Instruments

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

NOTE 11—FAIR VALUE OF FINANCIAL INSTRUMENTS


	December 31, 2025
	Level 1		Level 2		Level 3			Total
Interest rate swap derivative asset	$	—	$	220	$	—		$	220
Asset retirement obligations		—		—		(6,960	)		(6,960	)
	$	—	$	220	$	(6,960	)	$	(6,740	)


	December 31, 2024
	Level 1		Level 2		Level 3			Total
Interest rate swap derivative asset	$	—	$	769	$	—		$	769
Asset retirement obligations		—		—		(6,338	)		(6,338	)
Pico earn-out liability		—		—		(3,406	)		(3,406	)
	$	—	$	769	$	(9,744	)	$	(8,975	)

Interest rate swap derivatives are classified as Level 2 financial instruments and are valued utilizing Secured Overnight Financing Rates. In addition, certain assets are measured at fair value on a non-recurring basis when an indicator of impairment is identified and the assets’ fair values are determined to be less than its carrying value. See Note 3 for additional information.

A summary of changes in the fair value of the Company’s Level 3 instrument, attributable to asset retirement obligations, for the years ended December 31, 2025, 2024 and 2023 is included in Note 9. The Company’s earn-out fair value liability at its Idaho agricultural digester site was determined by calculating the estimated present value of the future obligation. The present value was assessed quarterly and was based on macro-economic factors such as inflation and risk free US Treasury rates. Company specific estimates utilized included current and future interest rates, digester inlet gas flow and projected EBITDA. A weighted average probability approach was utilized for the variables discussed above. The undiscounted maximum payout of the earn-out ranged between 5% and 20% of EBITDA based on average inlet gas production ranging from 641 standard cubic feet per minute ("scfm") to greater than 944 scfm for each semiannual period in the remaining term, as defined in the underlying agreement. In December 2025, the Company settled the earnout obligation for $4,000. The earn-out was classified as a Level 3 financial instrument and changes in

the balance are recorded in Accrued liabilities and Other liabilities within the Consolidated Balance Sheets and in Royalties, transportation, gathering and production fuel within the Consolidated Statements of Operations.

There were no transfer of assets or liabilities between Levels 1, 2 or 3 of the fair value hierarchy as of December 31, 2025 and 2024.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Goodwill And Intangible Assets, Net - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	$ 60	$ 60
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets with indefinite lives	230	230
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives	19,315	17,823
Total Goodwill and Intangible Assets	19,605	18,113
Interconnection [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives	13,972	14,614
Customer Contracts [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives	5,343	3,209
Land Use Rights [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets with indefinite lives	$ 230	$ 230

Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Summary of Property Plant and Equipment

Property, plant and equipment consists of the following as of December 31, 2025 and 2024:


	December 31, 2025			December 31, 2024
Land	$	1,568		$	1,568
Buildings and improvements		38,914			36,434
Machinery and equipment		321,834			275,692
Gas mineral rights		35,526			35,526
Construction work in progress		163,277			95,551
Total	$	561,119		$	444,771
Less: Accumulated depreciation and amortization		(219,724	)		(192,483	)
Property, plant & equipment, net	$	341,395		$	252,288

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Principles of Consolidation

The Company utilizes the equity method of accounting for companies where its ownership is greater than 50% and significant but controlling interest does not exist.

Reclassifications

Segment Reporting

Use of Estimates

Cash, Cash Equivalents and Restricted Cash

Accounts and Other Receivables

Property, Plant and Equipment

The estimated useful lives of the Company’s property, plant and equipment reflect the expected consumption of the economic benefit of these assets as noted in the following table:


Buildings and improvements	5 - 30 years
Machinery and equipment	1 - 43 years
Gas mineral rights	15 - 25 years

Goodwill and Intangible Assets

Goodwill is the cost of an acquisition less the fair value of the identified net assets of the acquired business.

The estimated useful lives of separately identified intangible assets are as follows:


Interconnection	10 - 25 years
Customer contracts	2 - 15 years
Emissions allowances	Indefinite
Land use rights	Indefinite

Leases

Long-lived Asset Impairment

A summary of impairment losses on tangible and intangible assets for the year ended December 31, 2025, 2024 and 2023 is included in Note 3.

Indefinite-Lived Asset Impairment

Asset Retirement Obligations

Revenue

Income Taxes

Derivative Instruments

Fair Value of Financial Instruments

Level 1—Unadjusted quoted prices in active markets for identical unrestricted assets and liabilities that the reporting entity has the ability to access at the measurement date.

Renewable Identification Numbers ("RINs")

Renewable Identification Numbers (“RINs”)

Renewable Energy Credits (“RECs”)

Equity-Based Compensation

Employee Benefits

Leave entitlement

Bonus Plans

Recently Issued Accounting Standards

Recently Adopted Accounting Standards

Recently Issued Accounting Standards

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Tax [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 4,542	$ 4,542
Unrecognized tax benefits	0	0
Unrecognized tax benefits income tax penalties and interest accrued	0	$ 0
MNK [Member]
Income Tax [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 565
Internal Revenue Service (IRS) [Member]
Income Tax [Line Items]
Years subject to examination by income tax	2021 2022 2023
Domestic Country [Member]
Income Tax [Line Items]
Net operating losses carry forward	$ 2,727
Domestic Country [Member] \| 2039 [Member]
Income Tax [Line Items]
Tax credit carry forward	$ 17,339
Tax credit carry forward period period of expiry	20 years
State and Local Jurisdiction [Member]
Income Tax [Line Items]
Net operating losses carry forward	$ 1,335

Property, Plant and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Oct. 31, 2024	Feb. 29, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Depreciation expense			$ 28,420	$ 22,096	$ 19,624
Payments To Acquire Productive Assets		$ 820
Proceeds from sale of plant	$ 1,000	$ 1,000
Gain on sale of plant				73
Impairment loss			3,231	1,586	902
Capital expenditures			$ 116,542	62,323	63,091
Maximum [Member]
Property, Plant and Equipment [Line Items]
Average Project Duration Period			36 months
Minimum [Member]
Property, Plant and Equipment [Line Items]
Average Project Duration Period			18 months
Gas mineral rights [Member]
Property, Plant and Equipment [Line Items]
Depletion expense			$ 364	$ 365	$ 489

Share-Based Compensation - Summary of Fair Value of MRI EICP Options and Valuation Assumptions (Detail)	12 Months Ended
	Dec. 31, 2025 $ / shares shares
MRI EICP [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected option life	5 years 6 months
MRI EICP [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected option life	3 years 6 months
MRI EICP April 2023 Awards [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options awarded \| shares	2,100,000
Grant-date fair value \| $ / shares	$ 4.25
MRI EICP April 2023 Awards [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	3.97%
Expected volatility, maximum	80.00%
MRI EICP April 2023 Awards [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	3.71%
Expected volatility, minimum	78.00%
MRI EICP January 2023 Awards [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options awarded \| shares	950,214
Risk-free interest rate	0.50%
Expected volatility	32.00%
Expected option life	5 years 6 months
Grant-date fair value \| $ / shares	$ 3.44

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Cash Flows [Abstract]
Cash paid for interest capitalized	$ 1,308	$ 0	$ 0

Leases - Summary of Supplemental Information Related To Finance Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lessor, Lease, Description [Line Items]
Cash paid for amounts included in the measurement of financing lease liabilities	$ 82	$ 73	$ 79
Weighted average remaining lease term (in years)	2 years 9 months 3 days	2 years 7 days	3 years 6 months 14 days
Weighted average discount rate			5.00%
Minimum [Member]
Lessor, Lease, Description [Line Items]
Weighted average discount rate	5.00%	5.00%
Maximum [Member]
Lessor, Lease, Description [Line Items]
Weighted average discount rate	6.00%	6.00%

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net (loss) income	$ 1,748	$ 9,734	$ 14,948
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	29,972	23,515	21,158
(Benefit) provision for deferred income taxes	(4,278)	804	1,876
Stock-based compensation	4,444	9,959	8,318
Derivative mark-to-market adjustments and settlements	549	486	560
Net loss on disposal of assets	36	0	94
(Decrease) increase in earn-out liability	594	(1,703)	1,266
Accretion of asset retirement obligations	485	445	407
Liabilities associated with properties sold	0	(225)	0
Amortization of debt issuance costs	391	360	367
Impairment loss	3,231	1,586	902
Non cash expense - RINs sold from equity method investment	1,661	0	0
Income from equity method investment	(1,485)	0	0
Accounts receivable	(995)	4,580	(5,531)
Royalty offset long term receivable	(4,595)	(3,089)	(3,515)
Income tax receivable	(661)	(354)	(89)
Critical spare inventory	(1,694)	472	(1,012)
Accounts payable and Accrued liabilities	735	(2,298)	1,326
Other	196	(477)	(22)
Net cash provided by operating activities	30,334	43,795	41,053
Cash flows from investing activities
Capital expenditures	(116,542)	(62,323)	(63,091)
Asset acquisition	0	(820)	0
Capital contributions to equity method investments	(4,000)	0	0
Cash collateral deposits	55	(48)	2
Proceeds from sale of assets	0	1,000	2
Net cash used in investing activities	(120,487)	(62,191)	(63,087)
Cash flows from financing activities:
Repayments of long-term debt	(12,000)	(8,000)	(8,000)
Borrowings on revolver	105,000	0	0
Repayments on revolver	(20,000)	0	0
Contingent consideration payments	(4,176)	0	0
Common stock issuance	5	6	4
Treasury stock purchase	(419)	(1,780)	(122)
Related party receivable	0	0	(1,138)
Finance lease payments	(71)	(68)	(74)
Net cash provided (used) in financing activities	68,339	(9,842)	(9,330)
Net decrease in cash and cash equivalents and restricted cash	(21,814)	(28,238)	(31,364)
Cash and cash equivalents and restricted cash at beginning of period	46,004	74,242	105,606
Cash and cash equivalents and restricted cash at end of period	24,190	46,004	74,242
Reconciliation of cash, cash equivalents, and restricted cash at end of period:
Cash and cash equivalents	23,752	45,621	73,811
Restricted cash and cash equivalents - current	8	8	8
Restricted cash and cash equivalents - non-current	430	375	423
Reconciliation of cash, cash equivalents, and restricted cash at end of year	24,190	46,004	74,242
Supplemental cash flow information:
Cash paid for interest, net of $1,308 and $0 capitalized respectively	4,058	4,300	5,003
Cash paid for income taxes	783	1,993	1,915
Accrual for purchase of property, plant and equipment included in accounts payable and accrued liabilities	11,785	4,699	5,471
Non-cash purchase of Treasury stock	0	8,309	0
Non-cash RIN distribution from equity method investment	$ 1,661	$ 0	$ 0

Debt - Additional Information (Detail) - USD ($)			12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Dec. 21, 2021	Sep. 12, 2019	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Extinguishment of Debt [Line Items]
Short term debt			$ 2,733,000	$ 11,853,000
Long term debt			$ 126,000,000	$ 43,763,000
Debt interest rate			6.44%	6.01%
Debt Issuance Costs, Net			$ 326,000
Debt Issuance Costs, capitalized			1,701,000
Amortized debt issuance expense			391,000	$ 360,000	$ 367,000
Unamortized debt issuance cost			601	479
Deferred Finance Costs Net			326,000
Long-term debt			126,000,000	$ 43,763,000
Payment of debt modification charges			2,027,000
Sixth Amended Revolving Credit Facility [Member]
Extinguishment of Debt [Line Items]
Debt Issuance Costs, Net			120
Deferred Finance Costs Net			120
Payment of debt modification charges			515
Term Loans [Member]
Extinguishment of Debt [Line Items]
Long-term debt			44,000,000
Revolving Credit Facility [Member]
Extinguishment of Debt [Line Items]
Line of Credit Facility, Current Borrowing Capacity			32,429,000
Revolver [Member]
Extinguishment of Debt [Line Items]
Long-term debt			85,000,000
Letter of Credit [Member]
Extinguishment of Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period			$ 2,571,000
MEH [Member] \| Second Amendment [Member]
Extinguishment of Debt [Line Items]
Line of Credit		$ 80,000,000
Repayment of long term debt		38,250,000
MEH [Member] \| Fourth Amendment [Member]
Extinguishment of Debt [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 120,000,000
Long-term debt	80,000,000
MEH [Member] \| Term Loans [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 2,500,000
MEH [Member] \| Term Loans [Member] \| Through Two Thousand And Twenty Four [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Periodic Payment, Principal	2,000,000
MEH [Member] \| Term Loans [Member] \| From Two Thousand And Twenty Five And Upto Two Thousand And Twetny Six [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Periodic Payment, Principal	3,000,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 32,000,000

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Common stock par or stated value per share	$ 0.01	$ 0.01
Common stock shares authorized	690,000,000	690,000,000
Common stock shares issued	143,912,811	143,792,811
Common stock shares outstanding	143,244,544	142,711,797
Treasury stock, shares	2,521,886	2,308,524

Related-Party Transactions

12 Months Ended

Dec. 31, 2025

Related-Party Transactions

NOTE 17—RELATED-PARTY TRANSACTIONS

Related Party Loan

On January 26, 2021, the Company entered into a Loan Agreement and Secured Promissory Note (the “Initial Promissory Note”) with Montauk Holdings Limited (“MNK”). MNK is currently an affiliate of the Company and certain of the Company’s directors are also directors of MNK. Pursuant to the Initial Promissory Note, the Company advanced a cash loan of $5,000 to MNK for MNK to pay its dividend's tax liability arising from the Reorganization Transactions under the South African Income Tax Act, 1962 (Act No. 58 of 1962), as amended (the “South African Income Tax Act”). On February 22, 2021, the Company and MNK entered into an Amended and Restated Promissory Note (the “Amended Promissory Note”) to increase the principal amount of the loan to a total of $7,140, in the aggregate, on December 22, 2021 entered into the Second Amended and Restated Loan Agreement and Secured Promissory Note (the “Second Amended Promissory Note”) to increase the principal amount of the loan to a total of $8,940, in the aggregate, and on December 22, 2022 entered into the First Amendment of the Second Amended and Restated Loan Agreement and Secured Promissory Note (the “First Amendment of Second Amended Promissory Note”) to amend the maturity date to June 30, 2023, and on June 21, 2023 entered into the Third Amended and Restated Loan Agreement and Secured Promissory Note (the "Third Amended and Restated Loan Agreement and Secured Promissory Note") to increase the principal amount of the loan to a total of $10,040, in the aggregate and extend the maturity date of the loan to December 31, 2023 and on December 27, 2023 entered into the Fourth Amended and Restated Loan Agreement and Secured Promissory Note to extend the maturity date of the loan to December 31, 2033, and on March 5, 2025 entered into the Fifth Amended and Restated Loan Agreement and Secured Promissory Note (the "Fifth Amended and Restated Loan Agreement and Secured Promissory Note") to increase the principal amount of the loan to a total of $10,690, in the aggregate, each in accordance with the Company’s obligations set forth in the TIA entered into by and among the Company, MNK and the other party thereto, dated November 6, 2020, and amended on January 14, 2021 and on December 31, 2024.

The "Third Amended and Restated Loan Agreement and Secured Promissory Note" increased the security interest of the Company from 800,000 shares of the common stock of the Company owned by MNK to 976,623 shares of the Company. MNK is required to use the proceeds of any such sale of the shares to repay the note. The Amended Promissory Note has default provisions where MNK will deliver any unsold shares of the Company back to the Company to satisfy repayment of the note No other terms were amended under the Fifth Amended and Restated Loan Agreement and Secured Promissory Note and the security interest of the Company from MNK remains 976,623 shares of the Company and the maturity remains December 31, 2033.

In December 2021, Rivetprops 47 Proprietary Limited (“RP47”) entered into an agreement to loan MNK up to 10,000 South African Rand (the “RP47 Loan”). The principal balance and accrued interest as of December 31, 2024 was 11,713 Rand or approximately $650 US Dollars. There was no collateral pledged for this loan. This loan became due on December 31, 2024 (“Maturity Date”) when MNK and RP47 did not extend the maturity of the loan agreement. Associated with a modification on December 31, 2024 of the TIA between us and MNK, we became obligated to repay the RP47 Loan on MNK’s behalf as MNK did not have sufficient funds to repay the RP47 Loan. On February 2, 2025, our Board of Directors approved the repayment of the RP47 Loan under the TIA. On March 5, 2025 and in connection with the Fifth Amended and Restated Loan Agreement and Secured Promissory Note", the Company repaid the RP47 loan as required under the TIA.

Variable Interest Entities

Under ASC 810-10-25-38A and 38B, a reporting entity is deemed to have a controlling financial interest in a VIE if it possesses both of the following characteristics: the power to direct the activities of the VIE that most significantly impact its economic performance, and the obligation to absorb losses of the VIE that could potentially be significant or the right to receive benefits from the VIE that could potentially be significant.

Under ASC 810, the Company determined that MNK is a variable interest entity. The Company does not hold any equity interest in MNK but has entered into the Fifth Amended and Restated Loan Agreement and Secured Promissory Note between the Company and MNK.

Prior to the RP47 Loan repayment, we concluded that RP47, a related party of us through RP47’s ownership of MNK, was the primary beneficiary of MNK under the variable interest entity model. In connection with the modification under the TIA, RP47 retained its power over MNK but no longer held significant benefits in MNK. Substantially all of MNK’s activities are conducted on our behalf as MNK’s only asset is the 976,623 shares of our common stock held as security for the Fifth Amended and Restated Loan Agreement and Secured Promissory Note. MNK’s only obligation is its loan to us and thus, we became the primary beneficiary of MNK on December 31, 2024. In accordance with ASC 810, we consolidated MNK on December 31, 2024. The Fifth Amended Promissory Note became an intercompany loan and was eliminated in consolidation. MNK’s investment of $10,178 in the Company was also eliminated in consolidation. There was no gain or loss on the initial consolidation of MNK as the transaction is a common control transaction. We also recorded a noncash acquisition of Treasury stock ($8,309) related to the consolidation of the 976,623 shares of our Common stock collateralizing the Fifth Amended Promissory Note. As of December 31, 2025, MNK amounts consolidated into MRI's consolidated balance sheet were $66 cash, $45 other current assets, $32 accrued liabilities and $39 in other long term liabilities.

Employment Transactions

The Company signed a long-term immaterial lease in December 2023 with a landowner in North Carolina. This lease enabled the Company to construct a feedstock collection system on the property which is owned by the Company. In September 2024, the Company hired the landowner as an employee to assist in the procuring of additional long-term leases on farms for additional collection system installations related to feedstock in North Carolina.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(e))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/850/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-6

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

+ Details

Share-Based Compensation

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

NOTE 15—SHARE-BASED COMPENSATION

The board of directors of Montauk Renewables adopted the Montauk Renewables, Inc. Equity and Incentive Compensation Plan (“MRI EICP”) in January 2021. Following the closing of the IPO, the board of directors of Montauk Renewables approved the grant of non-qualified stock options, restricted stock units and restricted share awards to the employees of Montauk Renewables and its subsidiaries in January 2021. In connection with the restricted share awards, the officers of the Company made elections under Section 83(b) of the Code. Pursuant to such elections, the Company withheld 950,214 shares of common stock from such awards at a price of $11.38 per share from such awards. The Company records and reports restricted shares and restricted stock units when vested and in the case of options, when such awards are settled in the Company’s common stock. Stock compensation expense related to these awards was $718, $1,470 and $1,723 for the years ended December 31, 2025, 2024 and 2023, respectively.

In connection with a May 2021 asset acquisition, 1,250,000 restricted share awards (“RS Awards”) were granted to two employees that were hired by the Company in connection with the acquisition. The RS Awards were to vest over a five-year period and subject to the achievement of time and performance-based vesting criteria over such period. In May 2022, the RS Awards were amended to remove the performance-based vesting criteria and were only subjected to time-based vesting requirements over a five-year period. The awards were revalued at $15,500. Stock compensation expense related to the two awards was $1,862, $5,866 and $4,908 for the year ended December 31, 2025, 2024 and 2023, respectively. Due to two employee terminations, $1,550 and $2,911 in accelerated noncash stock compensation expense was recognized in 2025 and 2024, respectively, within the line item General and administration expense. No additional compensation expense remains for these RS awards.

In 2023, the board of directors of the Company approved the grant of non-qualified stock options to the executive officers of the Company, which vest ratably over a period of three to five years. Stock compensation expense related to these awards was $1,869, $2,629 and $1,692 for the years ended December 31, 2025, 2024 and 2023, respectively.

The restricted shares, restricted stock units and option awards are subject to vesting schedules and are subject to the terms and conditions of the MRI EICP and related award agreements including, in the case of the restricted share awards, each officer having made an election under Section 83(b) of the Code.

Options granted under the MRI EICP allow the recipient to receive the Company’s common stock equal to the appreciation in the fair market value of the Company’s common stock between the grant date and the exercise and settlement of options into shares as of the exercise date(s). The fair value of the MRI EICP options was estimated using the Black-Scholes option pricing model with the following weighted-average assumptions (no dividends were expected):



	April 2023 Awards
Options awarded		2,100,000
Risk-free interest rate	3.71%-3.97%
Expected volatility	78%-80%
Expected option life (in years)	3.5-5.5
Grant-date fair value	$	4.25

	January 2021 Awards
Options awarded		950,214
Risk-free interest rate	0.5%
Expected volatility	32%
Expected option life (in years)		5.5
Grant-date fair value	$	3.44

The following table summarizes the restricted shares, restricted stock units and options outstanding under the MRI EICP for the years ended December 31, 2025, 2024 and 2023:



	Restricted Shares					Restricted Stock Units					Options
	Number of shares			Weighted Average Grant Date Fair Value		Number of shares			Weighted Average Grant Date Fair Value		Number of shares			Weighted Average Exercise Price
End of period - December 31, 2023		1,638,678		$	11.91		150,000		$	10.09		2,325,000		$	7.04
Beginning of period - January 1, 2024		1,638,678		$	11.91		150,000		$	10.09		2,325,000		$	7.04
Granted		—			—		80,000			4.41		—			—
Vested		(1,012,570	)		11.89		(60,000	)		9.49		—			—
End of period - Balance at December 31, 2024		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04

End of period - December 31, 2024		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04
Beginning of period - January 1, 2025		626,108		$	11.93		170,000		$	7.63		2,325,000		$	7.04
Granted		—		—			80,000			1.77		—			—
Vested		(626,108	)		11.93		(120,000	)		6.60		—			—
Forfeited		—			—		—			—		(225,000	)		9.57
End of period - December 31, 2025		—		$	—		130,000		$	4.97		2,100,000		$	6.77

Unrecognized MRI EICP compensation expense for awards the Company expects to vest as of December 31, 2025, was $2,945 and will be recognized over approximately 2.3 years.

Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

NOTE 7—PROPERTY, PLANT AND EQUIPMENT, NET

Property, plant and equipment consists of the following as of December 31, 2025 and 2024:


	December 31, 2025			December 31, 2024
Land	$	1,568		$	1,568
Buildings and improvements		38,914			36,434
Machinery and equipment		321,834			275,692
Gas mineral rights		35,526			35,526
Construction work in progress		163,277			95,551
Total	$	561,119		$	444,771
Less: Accumulated depreciation and amortization		(219,724	)		(192,483	)
Property, plant & equipment, net	$	341,395		$	252,288

Depreciation expense for Property, plant and equipment was $28,420, $22,096 and $19,624 and Depletion expense for gas mineral rights was $364, $365 and $489 for the years ended December 31, 2025, 2024 and 2023, respectively.

Construction work in progress consists of RNG and REG capital expenditures on developmental projects and improvements to existing sites. Projects, on average, last between 18 to 36 months, and when completed for their intended use, costs are placed in service and begin depreciating.

In February 2024, the Company completed an Asset acquisition with a privately-held entity. The Company paid $820 for land located in North Carolina. The Asset acquisition was accounted for as an asset purchase in accordance with ASC 805, Business

Combinations, and the purchase price has been allocated all to land within Property, plant and equipment, net on the Company's consolidated balance sheet.

In February 2024, for one of its REG sites, the Company entered into a bill of sale, assignment and assumption agreement to sell its rights to the existing fuel supply agreement and property back to the site host in advance of the fuel supply agreement termination date and received $1,000 in proceeds. The effective date of the sale, assignment and assumption agreement was October 2024. See Note 3 for impairment charges related to this site.

In October 2024, the Company entered into an asset purchase agreement to sell one of its immaterial RNG sites for a purchase price of $1,000. The Company entered into this agreement with the site host in advance of the expiration of the gas rights agreement. The company sold all of the site's assets and a $73 gain was recognized for the year ended December 31, 2024.

Defined Contribution Plan

12 Months Ended

Dec. 31, 2025

Retirement Benefits [Abstract]

Defined Contribution Plan

NOTE 16—DEFINED CONTRIBUTION PLAN

The Company maintains a 401(k) defined contribution plan for eligible employees. The Company matches 50% of an employee’s deferrals up to 4%. The Company also contributes 3% of eligible employee’s compensation expense as a safe harbor contribution. The matching contributions vest ratably over four years of service, while the safe harbor contributions vest immediately. Incurred expense related to the 401(k) plan was $867, $796 and $640 for the years ended December 31, 2025, 2024 and 2023, respectively.

Quarterly Financial Data (Unaudited) - Schedule Of Quarterly Financial Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Quarterly Financial Data [Abstract]
Operating Income (Loss)	$ 852	$ 16,123	$ 23,640
Net Income (Loss)	$ 1,748	$ 9,734	$ 14,948

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

+ Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]
Beginning balance at Dec. 31, 2022	$ 227,091	$ 1,416	$ (11,051)	$ 206,060	$ 30,666
Beginning balance, shares at Dec. 31, 2022		141,633,417
Beginning Balance Treasury Stock, shares at Dec. 31, 2022			971,306
Vesting of stock awards (in shares)		352,772
Vesting of stock awards	4	$ 4
Treasury stock, shares			13,456
Treasury stock	(122)		$ (122)
Net Income (Loss)	14,948				14,948
Stock-based compensation	8,318			8,318
Ending balance at Dec. 31, 2023	250,239	$ 1,420	$ (11,173)	214,378	45,614
Ending balance, shares at Dec. 31, 2023		141,986,189
Ending balance, Treasury Stock shares at Dec. 31, 2023			984,762
Vesting of stock awards (in shares)		725,608
Vesting of stock awards	6	$ 6
Treasury stock, shares			1,323,762
Treasury stock	(10,089)		$ (10,089)
Consolidation of VIE	(2,432)			(2,432)
Net Income (Loss)	9,734				9,734
Stock-based compensation	9,959			9,959
Ending balance at Dec. 31, 2024	$ 257,417	$ 1,426	$ (21,262)	221,905	55,348
Ending balance, shares at Dec. 31, 2024		142,711,797
Ending balance, Treasury Stock shares at Dec. 31, 2024	2,308,524		2,308,524
Vesting of stock awards (in shares)		532,747
Vesting of stock awards	$ 5	$ 5
Treasury stock, shares			213,362
Treasury stock	(419)		$ (419)
Consolidation of VIE	(47)			(47)
Net Income (Loss)	1,748				1,748
Stock-based compensation	4,444			4,444
Ending balance at Dec. 31, 2025	$ 263,148	$ 1,431	$ (21,681)	$ 226,302	$ 57,096
Ending balance, shares at Dec. 31, 2025		143,244,544
Ending balance, Treasury Stock shares at Dec. 31, 2025	2,521,886		2,521,886

Income Taxes - Schedule Of Deferred Tax Assets And Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss carry forwards	$ 4,147	$ 4,100
Federal tax credits	17,339	12,274
Book reserves	2,107	1,824
Intangible asset amortization	4,693	5,297
Stock compensation	1,360	1,657
Impairment	990	387
Lease liabilities	2,075	2,815
VIE Loss on investment	565	565
Total deferred tax assets	33,276	28,919
Less: valuation analysis	(4,542)	(4,542)
Net deferred tax assets	28,734	24,377
Deferred tax liabilities:
Property depreciation	(21,130)	(20,319)
Right of use assets	(2,054)	(2,786)
Total deferred tax liabilities	(23,184)	(23,105)
Net Deferred tax assets	$ 5,550	$ 1,272

Related-Party Transactions - Additional Information (Detail) $ in Thousands					1 Months Ended		12 Months Ended
	Mar. 02, 2025 USD ($) shares	Jun. 21, 2023 shares	Dec. 22, 2022 USD ($) shares	Jan. 26, 2021 USD ($)	Dec. 31, 2021 ZAR (R)	Dec. 31, 2021 USD ($)	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 22, 2021 USD ($)
Related Party Transaction [Line Items]
Debt instrument collateral shares \| shares	976,623	976,623	800,000
Debt Conversion, Maturity Period	Dec. 31, 2033
Current assets							$ 37,155	$ 57,224
Current liabilities							33,425	33,528
Accrued liabilities							11,735	10,069
Other Liabilities, Noncurrent							39	$ 2,795
Related Party
Related Party Transaction [Line Items]
Notes receivable from related parties current	$ 10,690		$ 8,940						$ 10,040	$ 7,140
MNK [Member]
Related Party Transaction [Line Items]
Investment in subsidiaries elimination in consolidation							$ 10,178
MNK [Member] \| Common Stock [Member]
Related Party Transaction [Line Items]
Debt instrument collateral shares \| shares							976,623
MNK [Member] \| Treasury Stock [Member]
Related Party Transaction [Line Items]
Debt Conversion, Converted Instrument, Amount							$ 8,309
MNK [Member] \| Loans Advanced To Related Parties [Member]
Related Party Transaction [Line Items]
Payment towards advances to related parties				$ 5,000
MNK [Member] \| Related Party
Related Party Transaction [Line Items]
Current loan principle and accrued interest					R 11,713	$ 650
MNK [Member] \| Related Party \| RP47 Loan [Member]
Related Party Transaction [Line Items]
Maturity date					Dec. 31, 2024	Dec. 31, 2024
MNK [Member] \| Related Party \| Maximum [Member]
Related Party Transaction [Line Items]
Loan amount \| R					R 10,000
MRI [Member]
Related Party Transaction [Line Items]
Other Assets, Current							45
Cash							66
Accrued liabilities							32
Other Liabilities, Noncurrent							$ 39

Subsequent Events

12 Months Ended

Dec. 31, 2025

Subsequent Events [Abstract]

Subsequent Events

NOTE 22—SUBSEQUENT EVENTS

The Company evaluated subsequent events related to its December 31, 2025 consolidated financial statements through the date the financial statements were issued. The Company is not aware of any subsequent events which would require recognition or disclosure in the financial statements, except for the matters discussed below.

On March 9, 2026, the Company entered into a new, five year Senior Credit Facility with CCH1 MEH Lender LLC (a wholly owned subsidiary of Hannon Armstong Capital LLC “HASI”, “New Senior Credit Facility”) that consists of up to $200,000 in senior indebtedness, of which $155,000 is outstanding as of March 11, 2026. These proceeds were used to repay all outstanding debt of the Company at the date of closing. Subject to various requirements as defined in the underlying agreement, the Company expects to have an additional $25,000 in proceeds drawn upon the conclusion of an engineering review over its Montauk Ag Renewables Acquisition. Also subject to various requirements as defined in the underlying agreement, the Company expects the final proceeds to be dispensed at the commissioning and operation of its Montauk Ag Renewables Ag Acquisition. Finally, the Company maintains a cash collateralized facility with an entity not related to the HASI New Senior Credit Facility and still has issued $2,190 of letters of credit. The New Senior Credit Facility matures in March 2031. The New Senior Credit Facility includes various affirmative and negative covenants that require the Company to meet specified financial ratios and financial tests, as defined in the underlying agreement. Under the New Senior Credit Facility, the Company is required to maintain:

•

Total Net Leverage Ratio (as defined in the Senior Credit Facility) of note more than 4.00 to 1.00, and

•

As of the end of each fiscal quarter, a Fixed Charge Coverage Ratio (as defined in the Senior Credit Facility)of not less than 1.20 to 1.00; and

•

Various other financial covenants or mandatory prepayments (as defined in the Senior Credit Facility).

The New Senior Credit Facility is subject to customary events of default and contemplates that the Company would be in default if, for any fiscal quarter (x) the average monthly D3 RIN price is less than $1.00 per RIN and (y) the consolidated average quarterly trailing EBITDA over the previous four quarters is less than $10,000.

The New Senior Credit Facility has a 24 month availability period during which only interest is payable quarterly. After the availability period, the Company is required to make quarterly principal payments equal to 1.25% of the total outstanding principal. The interest rate of the Senior Credit Facility is 10.25%.

In accordance with ASC 470-10-45-12 through 45, the Company classified $2,733 of its debt as short term debt, net of debt issuance costs, and $126,000 as long term debt as of December 31, 2025, based on management’s intent and demonstrated ability to refinance such obligations on a long term basis through the execution of the New Senior Credit Facility prior to issuance of the financial statements. The execution of the New Senior Credit Facility is disclosed as a non-recognized subsequent event.

Debt - Summary of Company Debt (Detail) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Term loans	$ 129,000,000
Less: current principal maturities	(3,000,000)	$ (12,000,000)
Less: debt issuance costs (on long-term debt)		(237,000)
Long-term debt	126,000,000	43,763,000
Current portion of long-term debt	2,733,000	11,853,000
Total debt	128,733,000	55,616,000
Revolver [Member]
Debt Instrument [Line Items]
Term loans	85,000
Term Loan [Member]
Debt Instrument [Line Items]
Term loans	$ 44,000,000	$ 56,000,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

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+ Details

Equity Method Investments - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) Numbers	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2025
Schedule of Equity Method Investments [Line Items]
Investments contributed to joint venture	$ 4,000
Short-term loan	167
RIN distributions	$ 1,661	$ 0	$ 0
Renewable identification numbers received \| Numbers	706
Income or loss on investment	$ 1,485
Non-consolidated equity method investment	3,824	$ 0
Maximum
Schedule of Equity Method Investments [Line Items]
Short-term loan	$ 333
Pesta Energy, LLC
Schedule of Equity Method Investments [Line Items]
Subsidary ownership percentage				51.00%
Pioneer Renewable Energy Marketing, LLC
Schedule of Equity Method Investments [Line Items]
Subsidary ownership percentage				49.00%

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset retirement obligations	$ (6,960)	$ (6,338)	$ (5,900)	$ (5,493)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pico earn-out liability	(4,000)
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap derivative asset	220	769
Asset retirement obligations	(6,960)	(6,338)
Pico earn-out liability		(3,406)
Fair Value, Net Asset (Liability)	(6,740)	(8,975)
Fair Value, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap derivative asset	0	0
Asset retirement obligations	0	0
Pico earn-out liability		0
Fair Value, Net Asset (Liability)	0	0
Fair Value, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap derivative asset	220	769
Asset retirement obligations	0	0
Pico earn-out liability		0
Fair Value, Net Asset (Liability)	220	769
Fair Value, Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap derivative asset	0	0
Asset retirement obligations	(6,960)	(6,338)
Pico earn-out liability		(3,406)
Fair Value, Net Asset (Liability)	$ (6,960)	$ (9,744)

Segment Information - Summary of Operating Revenue and Significant Expenses, by Segment (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Revenue

$ 176,382

$ 175,736

$ 174,904

Royalties, transportation, gathering and production fuel

32,945

31,502

34,861

Depreciation, depletion and amortization

29,972

23,515

21,158

Impairment

3,231

1,586

902

Total operating expenses

175,530

159,613

151,264

Operating income (loss)

852

16,123

23,640

Other expenses (income)

3,339

3,946

5,274

Income (loss) before income taxes

(2,487)

12,177

18,366

Assets

435,460

349,015

350,238

Capital expenditures

116,542

62,323

63,091

Operating Segments [Member]

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Revenue

172,967

175,736

174,904

Payroll and related expenses

12,385

^[1]

10,742

^[2]

9,470

^[3]

Wellfield operating and maintenance

10,255

^[1]

8,641

^[2]

5,739

^[3]

Plant expense

3,777

^[1]

3,395

^[2]

3,680

^[3]

Waste disposal

2,576

^[1]

2,407

^[2]

2,127

^[3]

Preventative maintenance

18,234

^[1]

17,284

^[2]

14,024

^[3]

Breakdown expenses

3,437

^[1]

2,205

^[2]

3,543

^[3]

Utility expense

16,890

^[1]

15,881

^[2]

15,747

^[3]

Royalties, transportation, gathering and production fuel

32,945

^[1]

31,502

^[2]

34,861

^[3]

Depreciation, depletion and amortization

29,709

^[1]

23,291

^[2]

20,913

^[3]

Impairment

3,227

^[1]

1,586

^[2]

902

^[3]

Other operating expenses

6,229

^[1],[4]

5,593

^[2],[5]

5,207

^[3],[6]

Total operating expenses

139,664

122,527

116,213

Operating income (loss)

33,303

53,209

58,691

Other expenses (income)

(1,042)

(8)

Income (loss) before income taxes

33,238

54,251

58,699

Assets

393,208

294,957

250,320

Capital expenditures

116,311

61,683

63,007

Corporate and Other [Member]

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Revenue

3,415

Payroll and related expenses

19,152

23,847

20,396

Total operating expenses

35,866

^[7]

37,086

^[8]

35,051

^[9]

Operating income (loss)

(32,451)

(37,086)

(35,051)

Other expenses (income)

3,274

^[10]

4,988

^[11]

5,282

^[12]

Income (loss) before income taxes

(35,725)

(42,074)

(40,333)

Assets

42,252

54,058

99,918

Capital expenditures

231

640

RNG [Member]

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Impairment

777

RNG [Member] | Operating Segments [Member]

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Revenue

155,736

157,983

156,455

Payroll and related expenses

9,242

^[1]

8,516

^[2]

7,620

^[3]

Wellfield operating and maintenance

7,220

^[1]

5,104

^[2]

3,659

^[3]

Plant expense

2,276

^[1]

2,262

^[2]

2,874

^[3]

Waste disposal

2,415

^[1]

2,353

^[2]

2,103

^[3]

Preventative maintenance

15,045

^[1]

13,677

^[2]

10,202

^[3]

Breakdown expenses

2,069

^[1]

1,736

^[2]

2,711

^[3]

Utility expense

16,376

^[1]

15,571

^[2]

15,168

^[3]

Royalties, transportation, gathering and production fuel

30,986

^[1]

29,529

^[2]

32,876

^[3]

Depreciation, depletion and amortization

24,377

^[1]

18,192

^[2]

15,720

^[3]

Impairment

3,107

^[1]

843

^[2]

777

^[3]

Other operating expenses

4,450

^[1],[4]

4,168

^[2],[5]

3,458

^[3],[6]

Total operating expenses

117,563

101,951

97,168

Operating income (loss)

38,173

56,032

59,287

Other expenses (income)

(32)

Income (loss) before income taxes

38,158

56,064

59,271

Assets

201,056

187,438

176,951

Capital expenditures

38,693

25,403

41,325

REG [Member] | Operating Segments [Member]

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

Revenue

17,231

17,753

18,449

Payroll and related expenses

3,143

^[1]

2,226

^[2]

1,850

^[3]

Wellfield operating and maintenance

3,035

^[1]

3,537

^[2]

2,080

^[3]

Plant expense

1,501

^[1]

1,133

^[2]

806

^[3]

Waste disposal

161

^[1]

^[2]

^[3]

Preventative maintenance

3,189

^[1]

3,607

^[2]

3,822

^[3]

Breakdown expenses

1,368

^[1]

469

^[2]

832

^[3]

Utility expense

514

^[1]

310

^[2]

579

^[3]

Royalties, transportation, gathering and production fuel

1,959

^[1]

1,973

^[2]

1,985

^[3]

Depreciation, depletion and amortization

5,332

^[1]

5,099

^[2]

5,193

^[3]

Impairment

120

^[1]

743

^[2]

125

^[3]

Other operating expenses

1,779

^[1],[4]

1,425

^[2],[5]

1,749

^[3],[6]

Total operating expenses

22,101

20,576

19,045

Operating income (loss)

(4,870)

(2,823)

(596)

Other expenses (income)

(1,010)

(24)

Income (loss) before income taxes

(4,920)

(1,813)

(572)

Assets

192,152

107,519

73,369

Capital expenditures

$ 77,618

$ 36,280

$ 21,682

[1]	Significant expenses regularly reviewed by the CODM.
[2]	Significant expenses regularly reviewed by the CODM.
[3]	Significant expenses regularly reviewed by the CODM.
[4]	The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.
[5]	The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.
[6]	The majority of other operating expenses for RNG and REG are consumables, rent, environmental compliance and general and administrative expenses.
[7]	The majority of operating expenses for Corporate and other are payroll and related expenses of $19,152, insurance of $4,646 and professional and IT fees of $4,843.
[8]	The majority of operating expenses for Corporate and other are payroll and related expenses of $23,847, insurance of $5,488 and professional and IT fees of $4,141.
[9]	The majority of operating expenses for Corporate and other are payroll and related expenses of $20,396, insurance of $5,951 and professional and IT fees of $5,399.
[10]	The majority of other expense (income) for Corporate and other are interest expense of $4,816 and income from equity investment of ($1,485).
[11]	The majority of other expense (income) for Corporate and other is interest expense of $5,276.
[12]	The majority of other expense (income) for Corporate and other is interest expense of $5,753.

Subsequent Events - Additional Information (Detail)	Mar. 11, 2026 USD ($)	Mar. 09, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Subsequent Event [Line Items]
Short term debt			$ 2,733,000	$ 11,853,000
Long term debt			$ 126,000,000	$ 43,763,000
Subsequent Event [Member] \| New Senior Credit Facility [Member]
Subsequent Event [Line Items]
Senior indebtedness		$ 200,000,000
Letters of credit		$ 2,190,000
Total net leverage ratio		4
Interest rate of credit facility		10.25%
Subsequent Event [Member] \| CCH1 MEH Lender LLC [Member] \| New Senior Credit Facility [Member]
Subsequent Event [Line Items]
Debt instrument, term		5 years
Outstanding amount	$ 155,000,000
Proceeds from credit facility		$ 25,000,000
Credit facility, expiration date		Mar. 31, 2031
Fixed charge coverage ratio		1.2
D3 renewable identification number average monthly price		1
Consolidated average quarterly trailing EBITDA		$ 10,000,000
Frequency of payment		quarterly
Quarterly interest rate		1.25%

Derivative Instruments

12 Months Ended

Dec. 31, 2025

Derivative Instrument Detail [Abstract]

Derivative Instruments

NOTE 10—DERIVATIVE INSTRUMENTS

To mitigate market risk associated with fluctuations in interest rates, the Company utilizes various derivative contracts to secure interest rates under a board-approved program. The Company does not apply hedge accounting to any of its derivative instruments, and all realized and unrealized gains and losses from changes in derivative values are recognized in earnings each period. As a result of the economic hedging strategies employed, the Company had the following interest expense in the Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


		For The Year Ended December 31,
Derivative Instrument	Location	2025			2024			2023
Interest rate swaps	Interest expense		(549	)		(486	)		(560	)
Net loss		$	(549	)	$	(486	)	$	(560	)

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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