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Note O - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
State and Local Jurisdiction [Member] |  |
State and Local Income Tax Expense (Benefit), Continuing Operations | $ 0 | $ 0
Operating Loss Carryforwards | 428,600 |
Domestic Tax Jurisdiction [Member] |  |
Operating Loss Carryforwards | 381,300 |
Operating Loss Carryforwards, Subject to Expiration | 118,500 |
Operating Loss Carryforwards, Not Subject to Expiration | 262,800 |
Foreign Tax Jurisdiction [Member] | Danish [Member] |  |
Operating Loss Carryforwards | $ 7,700 |

X
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