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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Deferred Tax Assets, Net | $ 527,000 |  | $ 527,000 |  | $ 533,500
Deferred Tax Assets, Valuation Allowance | 511,000 |  | 511,000 |  | $ 533,000
Deferred Income Tax Expense (Benefit) | (18,100) |  | (15,420) | $ 32 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | $ (27,000) |  |  |
SPO [Member] |  |  |  |  |
Deferred Tax Assets, Net | 51,100 |  | 51,100 |  |
Deferred Tax Assets, Valuation Allowance | $ 51,100 |  | $ 51,100 |  |

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