| Balance Sheets | 2026-03-31 | 2025-12-31 | 2025-09-30 | 2025-06-30 |
|---|---|---|---|---|
| Fuel tax credits receivable | NaN | NaN | 3,264 | 3,264 |
| Cash and cash equivalents | 133,241 | 24,408 | 29,928 | 29,269 |
| Accounts receivable, net of allowances of 2,454 and , respectively (includes 17 and 435 at september30, 2025 and december31, 2024, respectively, related to consolidated vies)-Nonrelated Party | NaN | NaN | 31,113 | 29,085 |
| Accounts receivable, related party-Related Party | NaN | NaN | 21,691 | 25,496 |
| Accounts receivable, net of allowances of 806 and 469, respectively | 42,636 | 61,806 | NaN | NaN |
| Restricted cash - current | 926 | 1,210 | 1,077 | 979 |
| Contract assets | 6,782 | 8,276 | 12,646 | 10,556 |
| Parts inventory | 12,201 | 10,964 | 12,082 | 13,004 |
| Prepaid expense and other current assets | 17,615 | 16,018 | 10,984 | 11,833 |
| Total current assets | 213,401 | 122,682 | 122,785 | 123,486 |
| Property, plant, and equipment, net | 512,546 | 495,634 | 484,351 | 477,063 |
| Investments in other entities | 224,282 | 231,223 | 227,545 | 224,577 |
| Net investment in sales-type lease | 10,651 | 8,224 | NaN | NaN |
| Restricted cash - non-current | 2,807 | 2,700 | 3,278 | 3,257 |
| Goodwill | 54,608 | 54,608 | 54,608 | 54,608 |
| Other long-term assets | 42,307 | 44,398 | 24,182 | 22,546 |
| Total assets | 1,060,602 | 959,469 | 916,749 | 905,537 |
| Accounts payable-Nonrelated Party | NaN | NaN | 15,281 | 19,589 |
| Accounts payable-Related Party | NaN | NaN | 7,425 | 8,288 |
| Fuel tax credits payable | NaN | NaN | 3,069 | 3,471 |
| Accrued payroll (includes 39 and 45 at september30, 2025 and december31, 2024, respectively, related to consolidated vies) | NaN | NaN | 8,611 | 7,663 |
| Accounts payable | 9,631 | 19,004 | NaN | NaN |
| Contract liabilities | 5,070 | 6,296 | 8,378 | 8,631 |
| Loan, current portion | 19,473 | 15,062 | 9,349 | 6,233 |
| Accrued and payable capital expenditures | NaN | NaN | 10,014 | NaN |
| Accrued environmental credit rebates | NaN | NaN | 4,593 | 4,705 |
| Accrued capital expenses | NaN | NaN | NaN | 24,859 |
| Sunoma loan - current portion (includes 1,861 and 1,756 at september30, 2025 and december31, 2024, respectively, related to consolidated vies) | NaN | NaN | 1,861 | 1,825 |
| Accrued expenses and other current liabilities | 62,890 | 63,857 | 14,880 | 12,969 |
| Total current liabilities | 97,064 | 104,219 | 83,461 | 98,233 |
| Operating lease liabilities - non-current portion | NaN | NaN | 11,940 | 12,007 |
| Opal term loan, net of debt issuance costs | NaN | NaN | 313,324 | 295,753 |
| Loans, net of debt issuance costs | 427,698 | 337,063 | 17,071 | 17,515 |
| Other long-term liabilities | 23,946 | 20,430 | 8,157 | 8,783 |
| Total liabilities | 548,708 | 461,712 | 433,953 | 432,291 |
| Redeemable non-controlling interests-Redeemable Preferred Noncontrolling Interest | 150,000 | 130,000 | 130,000 | 130,000 |
| Redeemable non-controlling interests-Redeemable Noncontrolling Interest | 343,467 | 377,898 | 342,528 | 365,548 |
| Common stock-Common Class A | 3 | 3 | 3 | 3 |
| Common stock-Common Class B | 12 | 12 | 12 | 12 |
| Common stock-Common Class C | 0 | 0 | 0 | 0 |
| Common stock-Common Class D | 2 | 2 | 2 | 2 |
| Additional paid-in capital | NaN | NaN | NaN | 0 |
| Retained earnings (accumulated deficit) | 19,632 | -1,307 | 19,089 | -13,442 |
| Accumulated other comprehensive income (loss) | 184 | -26 | -12 | 2 |
| Class a common stock in treasury, at cost 1,635,783 as of march31, 2026 and december31, 2025 | 11,614 | 11,614 | 11,614 | 11,614 |
| Total stockholders' equity (deficit) attributable to the company | 8,219 | -12,930 | 7,480 | -25,037 |
| Non-redeemable non-controlling interests | 10,208 | 2,789 | 2,788 | 2,735 |
| Total stockholders' equity (deficit) | 18,427 | -10,141 | 10,268 | -22,302 |
| Total liabilities, redeemable preferred, redeemable non-controlling interests and stockholders' equity (deficit) | 1,060,602 | 959,469 | 916,749 | 905,537 |
OPAL Fuels Inc. (OPAL)
OPAL Fuels Inc. (OPAL)