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Note 11 - Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three months ended September 30, 2025 |  |  | Nine months ended September 30, 2025 |
|  | Chemical |  |  | Biofuel |  |  | Total |  |  | Chemical |  |  | Biofuel |  |  | Total |
Revenue |  | $ | 15,578 |  |  | $ | 7,111 |  |  | $ | 22,689 |  |  | $ | 41,562 |  |  | $ | 34,338 |  |  | $ | 75,900 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of goods sold |  |  | 19,699 |  |  |  | 9,250 |  |  |  | 28,949 |  |  |  | 49,212 |  |  |  | 55,061 |  |  |  | 104,273 |
Distribution |  |  | 291 |  |  |  | 280 |  |  |  | 571 |  |  |  | 825 |  |  |  | 963 |  |  |  | 1,788 |
Segment gross loss |  | $ | (4,412 | ) |  | $ | (2,419 | ) |  | $ | (6,831 | ) |  | $ | (8,475 | ) |  | $ | (21,686 | ) |  | $ | (30,161 | )
Reconciliation of Segment gross loss to Net loss before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selling, general, and administrative expenses |  |  |  |  |  |  |  |  |  | $ | 2,049 |  |  |  |  |  |  |  |  |  |  | $ | 7,161 |
Research and development expenses |  |  |  |  |  |  |  |  |  |  | 855 |  |  |  |  |  |  |  |  |  |  |  | 3,179 |
Other income, net |  |  |  |  |  |  |  |  |  |  | (381 | ) |  |  |  |  |  |  |  |  |  |  | (3,129 | )
Net loss before income taxes |  |  |  |  |  |  |  |  |  | $ | (9,354 | ) |  |  |  |  |  |  |  |  |  | $ | (37,372 | )
|  | Three months ended September 30, 2024 |  |  | Nine months ended September 30, 2024 |
|  | Chemical |  |  | Biofuel |  |  | Total |  |  | Chemical |  |  | Biofuel |  |  | Total |
Revenue |  | $ | 17,928 |  |  | $ | 33,212 |  |  | $ | 51,140 |  |  | $ | 55,223 |  |  | $ | 126,607 |  |  | $ | 181,830 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of goods sold |  |  | 14,357 |  |  |  | 35,831 |  |  |  | 50,188 |  |  |  | 42,549 |  |  |  | 123,158 |  |  |  | 165,707 |
Distribution |  |  | 164 |  |  |  | 405 |  |  |  | 569 |  |  |  | 569 |  |  |  | 1,507 |  |  |  | 2,076 |
Segment gross profit (loss) |  | $ | 3,407 |  |  | $ | (3,024 | ) |  | $ | 383 |  |  | $ | 12,105 |  |  | $ | 1,942 |  |  | $ | 14,047 |
Reconciliation of Segment gross profit (loss) to Net (loss) income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selling, general, and administrative expenses |  |  |  |  |  |  |  |  |  | $ | 2,290 |  |  |  |  |  |  |  |  |  |  | $ | 6,483 |
Research and development expenses |  |  |  |  |  |  |  |  |  |  | 981 |  |  |  |  |  |  |  |  |  |  |  | 2,803 |
Other income, net |  |  |  |  |  |  |  |  |  |  | (1,690 | ) |  |  |  |  |  |  |  |  |  |  | (8,580 | )
Net (loss) income before income taxes |  |  |  |  |  |  |  |  |  | $ | (1,198 | ) |  |  |  |  |  |  |  |  |  | $ | 13,341 |

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