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Note 16 - Income Tax (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Deferred Tax Liabilities, Net | $ 694 | $ 735
Undistributed Earnings of Foreign Subsidiaries | 6,500 | $ 1,300
Alcohol and Cellulosic Biofuel Credit Carryforward [Member] |  |
Tax Credit Carryforward, Amount | 1,500 |
Investment Tax Credit Carryforward [Member] |  |
Tax Credit Carryforward, Amount | 3,400 |
Carbon Oxide Sequestration Credit Carryforward [Member] |  |
Tax Credit Carryforward, Amount | 9,300 |
Research Tax Credit Carryforward [Member] |  |
Tax Credit Carryforward, Amount | 300 |
Domestic Tax Jurisdiction [Member] |  |
Operating Loss Carryforwards | 323,000 |
Operating Loss Carryforwards Subject to Expiration | 188,000 |
Operating Loss Carryforwards Not Subject to Expiration | $ 135,000 |
Domestic Tax Jurisdiction [Member] | Minimum [Member] |  |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2027 |
Domestic Tax Jurisdiction [Member] | Maximum [Member] |  |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2043 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards | $ 408,000 |
Operating Loss Carryforwards Subject to Expiration | $ 408,000 |
State and Local Jurisdiction [Member] | Minimum [Member] |  |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2027 |
State and Local Jurisdiction [Member] | Maximum [Member] |  |
Operating Loss Carryforwards, Expiration Date | Dec. 31, 2042 |

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