Note 5 - Other Current Assets - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|
| Supplies and parts | $ 9,448 | $ 9,372 | ||
| Clean Fuel Production Credit | 3,624 | 2,460 | ||
| Collateralization of derivative instruments, net of fair value | [1] | 698 | 2,266 | |
| Small Producers Tax Credit | 549 | 194 | ||
| Other | 121 | 91 | ||
| Total | $ 14,440 | $ 14,383 | ||
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