Summary of Significant Accounting Policies (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| Accounting Policies [Abstract] |
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| Cash, Cash Equivalents and Restricted Cash |
Cash, cash equivalents, and restricted cash consisted of the following as of December 31, 2025 and 2024: | | | | | | | | | | December 31,
2025 | December 31,
2024 | | Current assets: | | | | Cash and cash equivalents | $ | 24,408 | | $ | 24,310 | | | Restricted cash - current | 1,210 | | 972 | | | Long-term assets: | | | | Restricted cash - non - current | 2,700 | | 2,298 | | | Total cash, cash equivalents, and restricted cash | $ | 28,318 | | $ | 27,580 | |
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| Cash, Cash Equivalents and Restricted Cash |
Cash, cash equivalents, and restricted cash consisted of the following as of December 31, 2025 and 2024: | | | | | | | | | | December 31,
2025 | December 31,
2024 | | Current assets: | | | | Cash and cash equivalents | $ | 24,408 | | $ | 24,310 | | | Restricted cash - current | 1,210 | | 972 | | | Long-term assets: | | | | Restricted cash - non - current | 2,700 | | 2,298 | | | Total cash, cash equivalents, and restricted cash | $ | 28,318 | | $ | 27,580 | |
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| Prepaid Expense And Other Current Assets |
| | | | | | | | | | Year Ended December 31, | | 2025 | 2024 | | Fuel tax credits receivable | $ | 3,264 | | $ | 5,639 | | | Prepaid insurance | 3,767 | | 4,001 | | | Environmental credits held for sale | 3,758 | | 6,466 | | | Other | 5,229 | | 7,477 | | | Total prepaid expense and other current assets | $ | 16,018 | | $ | 23,583 | |
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| Useful Lives of Property, Plant and Equipment, Net |
Depreciation is computed using the straight‑line method over the estimated useful lives of the assets as follows: | | | | | | | Plant and equipment | 5 - 30 years | CNG/RNG Fueling Stations | 10 - 20 years | | Construction in progress | N/A | | Buildings | 40 years | | Land | N/A | | Service equipment | 5 - 10 years | | Leasehold improvements | shorter of lease term or useful life | | Vehicles | 7 years | | Office furniture and equipment | 5 - 7 years | | Computer software | 3 years | | Land lease - finance lease | Lease term | | Vehicles - finance lease | shorter of lease term or useful life | | Other | 7 years |
Property, plant, and equipment, net, consisted of the following as of December 31, 2025 and 2024: | | | | | | | | | | December 31,
2025 | December 31,
2024 | | Plant and equipment | $ | 322,123 | | $ | 317,926 | | | Construction in progress | 203,312 | | 169,571 | | CNG/RNG fueling stations (1) | 90,453 | | 68,899 | | | Finance leases | 2,725 | | 9,550 | | | Other | 10,064 | | 9,688 | | | 628,677 | | 575,634 | | Less: accumulated depreciation (2) | (133,043) | | (117,376) | | | Property, plant, and equipment, net | $ | 495,634 | | $ | 458,258 | |
(1) Includes $87,888 and $68,899 lessor operating lease right of use assets as of December 31, 2025 and 2024, respectively. (2) Includes $18,399 and $14,569 lessor operating lease accumulated depreciation for the years ended December 31, 2025 and 2024, respectively.
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| Accrued Expenses And Other Current Liabilities |
| | | | | | | | | | Year Ended December 31, | | 2025 | 2024 | | Accrued capital expenditures | $ | 24,629 | | $ | 23,238 | | | Accrued payroll | 7,719 | | 9,580 | | | Accrued environmental credit rebates | 4,993 | | 5,391 | | | Accrued expenses and other current liabilities | 26,516 | | 26,379 | | | Total accrued expenses and other current liabilities | $ | 63,857 | | $ | 64,588 | |
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| Changes in the Asset Retirement Obligation |
The changes in the asset retirement obligations were as follows as of December 31, 2025: | | | | | | | Balance, December 31, 2024 - current | $ | 2,804 | | | Balance, December 31, 2024 - non-current | 5,082 | | | Additional asset retirement obligations acquired/incurred | 135 | | | Settlement | (931) | | | Accretion expense | 455 | | | Change in estimate | 914 | | | Balance, December 31, 2025 - current and non-current | 8,459 | | | Less: current portion | 3,167 | | | Total asset retirement obligation, net of current portion | $ | 5,292 | |
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