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Note 17 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 12, 2025 | Mar. 02, 2022 | Feb. 28, 2025 | Jan. 31, 2025 | Dec. 31, 2024 | Jan. 01, 2025 | Dec. 31, 2023 | Dec. 31, 2022
Warrants and Rights Outstanding, Term (Year) |  |  |  |  | 4 years 9 months 10 days |  | 5 years 9 months 7 days | 7 years 5 months 23 days
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  | $ 11.7 |  | $ 11.7 | $ 15.92
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  |  |  |  | Prime Rate [Member] |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Proceeds From Sale of Investment Tax Credits |  |  | $ 7,100 | $ 12,300 |  |  |  |
Subsequent Event [Member] | PUPA Eighth Amendment [Member] |  |  |  |  |  |  |  |
Preferred Stock, Redemption Amount | $ 114,800 |  |  |  |  |  |  |
Credit Agreement, Interest Rate | 16.00% |  |  |  |  |  |  |
Subsequent Event [Member] | PUPA Eighth Amendment [Member] | Prime Rate [Member] |  |  |  |  |  |  |  |
Credit Agreement, Interest Rate | 10.00% |  |  |  |  |  |  |
Subsequent Event [Member] | Warrants to Lenders [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  | 113 |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  | 2 years |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  | $ 0.01 |  |
Subordinated Notes 1 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Debt Instrument, Cash Extension Fee |  |  |  |  |  | $ 90 |  |
Subordinated Notes 2 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Debt Instrument, Cash Extension Fee |  |  |  |  |  | $ 250 |  |
Fuels Revolving Line [Member] | GAFI [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 10.00% |  |  |
Fuels Revolving Line [Member] | Prime Rate [Member] | GAFI [Member] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 6.00% |  |  |  |  |  |
Fuels Revolving Line [Member] | Subsequent Event [Member] | GAFI [Member] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 11.00% |  |  |  |  |  |  |
Fuels Revolving Line [Member] | Subsequent Event [Member] | GAFI [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 15.00% |  |  |  |  |  |  |
Fuels Revolving Line [Member] | Subsequent Event [Member] | Prime Rate [Member] | GAFI [Member] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 11.00% |  |  |  |  |  |  |
Fuels Revolving Line Promissory Note [Member] | Subsequent Event [Member] | GAFI and ACCI [Member] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 24.00% |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 10,000 |  |  |  |  |  |  |

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