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Note 7 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Tax Expense (Benefit) $ 62 $ (0) $ 125 $ (0)
Valuation Allowance, Deferred Tax Asset, Percentage of Net Deferred Tax Assets     100.00%