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Note 7 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Expense (Benefit) $ (295,000) $ 431,000  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 627,000 $ 17,000  
Unrecognized Tax Benefits 161,000 287,000 $ 278,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued 36,000    
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 0    
Domestic Tax Jurisdiction [Member]      
Operating Loss Carryforwards $ 1,966,000 $ 0