SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounting Policies [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Basis of Presentation and Principles of Consolidation | The unaudited condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States ("U.S. GAAP") and include the assets and liabilities of the Company and its consolidated subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. In the opinion of management, the Company's financial statements include all normal and recurring adjustments necessary to make the financial statements not misleading and to provide a fair presentation of the Company's financial results for the interim period included in this Quarterly Report. The information included in this Quarterly Report should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The Company consolidates all entities in which it holds a majority voting interest, as well as variable interest entities ("VIEs") for which it is determined to be the primary beneficiary. The Company's variable interests in each of the VIEs arise primarily from ownership of membership interests, construction commitments, the provision of operating and maintenance services, and the provision of environmental credit processing services to VIEs. The Company reassesses its primary beneficiary status on an ongoing basis. Noncontrolling interests related to the Company’s VIEs are presented separately from stockholders' equity (deficit) on the condensed consolidated balance sheets and are reported as non-redeemable non-controlling interests within the condensed consolidated statements of changes in redeemable non-controlling interest, redeemable preferred non-controlling interest and stockholders' equity (deficit).
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| Use of Estimates | The preparation of condensed consolidated financial statements in conformity with U.S. 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The Company's significant estimates and assumptions include the residual values and useful lives of property, plant and equipment; the fair value of long-lived assets; asset retirement obligations; the percentage of completion used for revenue recognition; the incremental borrowing rate used to measure right-of-use assets and lease liabilities; and the fair value of reporting units for goodwill impairment testing.
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| Accounting Pronouncements Not Yet Adopted and Recently Adopted Accounting Pronouncements | 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, which requires additional, disaggregated disclosure about certain income statement expense line items. The ASU is effective for annual periods beginning after December 15, 2026, and interim periods beginning after December 15, 2027. The amendments are to be applied prospectively with the option for retrospective application. The Company is currently evaluating the impact that this guidance will have on the disclosures within our condensed consolidated financial statements. Recently Adopted Accounting Pronouncements In December 2025, the FASB issued ASU 2025-10, Accounting for Government Grants Received by Business Entities. The Company early adopted ASU 2025-10 effective July 1, 2026. See "Change in Accounting Principle" above.
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| Parts Inventory | Parts inventory, also referred to as supplies inventory, consists of shop spare parts inventory and construction site parts inventory. Parts inventory is stated at historical cost, which is determined using the average cost method, and is recorded at the lower of cost or net realizable value. An annual review of inventory is performed to identify obsolete items. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Environmental Credits Held for Sale | For the three months ended September 30, 2026 and 2025, the Company recorded $1,405 and $4,515 as part of Cost of sales - Fuel Station Services in the condensed consolidated statements of operations to adjust environmental credits held for sale to lower of cost and net realizable value. For the nine months ended September 30, 2026 and 2025, the Company recorded $5,607 and $15,055, respectively.
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| Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consist primarily of accrued capital expenditures, accrued payroll and related benefits, accrued environmental credit rebates, and other miscellaneous accrued operating expenses. Accrued environmental credit rebates represent the Company's liabilities for dispensing services provided by third-party vendors.
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| Contract Balances | Contract assets consist primarily of costs and estimated earnings in excess of billings and retainage receivables. Costs and estimated earnings in excess of billings represent unbilled amounts earned and reimbursable under construction contracts and arise when revenues have been recognized but amounts are conditional and have yet to be billed under the terms of the contract. Amounts become billable in accordance with contract terms, generally based on progress toward completion and the achievement of contractual milestones. Cost and estimated earnings in excess of billings amounted to $7,282 and $6,489 as of September 30, 2026 and December 31, 2025, respectively. Contract liabilities consist of billings in excess of costs and estimated earnings and other deferred construction revenue. Billings in excess of costs and estimated earnings represent amounts billed to or collected from customers in advance of the satisfaction of the related performance obligations. These amounts are recognized as revenue as the Company satisfies its performance obligations over the remaining contract term.
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| Impairment | During the nine months ended September 30, 2026, the Company recognized impairment charges of $3,595 related to certain long-lived assets in its Renewable Power segment and $561 related to certain long-lived assets in its Fuel Station Services segment. The impairment within its Renewable Power segment resulted from the Company's decision to repurpose a renewable power facility for use as an RNG facility. As a result of the change in intended use, certain assets associated with the renewable power facility were no longer expected to be utilized and had no alternative future use. Accordingly, the Company determined that the fair value of the affected assets was zero and recorded an impairment charge equal to their carrying value.
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| Leases | Lessor contracts Sales-Type Leases During the nine months ended September 30, 2026, the Company entered into new sales-type leases. Upon commencement, the carrying value of the underlying assets were removed from the balance sheet and the net investment in the leases was recognized, measured at the present value of future lease payments discounted at the rate implicit in the leases. During the nine months ended September 30, 2026, $4,161 was recognized within fuel station services revenues and $3,349 was recorded in cost of sales - fuel station services. During the three months ended September 30, 2026, $1,915 was recognized within fuel station services revenues and $1,511 was recorded in cost of sales - fuel station services. As of September 30, 2026, a maturity analysis of lease receivables reflecting undiscounted cash flows to be received on an annual basis are as follows:
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| Leases | Lessor contracts Sales-Type Leases During the nine months ended September 30, 2026, the Company entered into new sales-type leases. Upon commencement, the carrying value of the underlying assets were removed from the balance sheet and the net investment in the leases was recognized, measured at the present value of future lease payments discounted at the rate implicit in the leases. During the nine months ended September 30, 2026, $4,161 was recognized within fuel station services revenues and $3,349 was recorded in cost of sales - fuel station services. During the three months ended September 30, 2026, $1,915 was recognized within fuel station services revenues and $1,511 was recorded in cost of sales - fuel station services. As of September 30, 2026, a maturity analysis of lease receivables reflecting undiscounted cash flows to be received on an annual basis are as follows:
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