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Note 8 - Stock-Based Compensation (Details Textual) - USD ($)
3 Months Ended
Apr. 09, 2025
Mar. 31, 2025
Mar. 31, 2024
Share-Based Payment Arrangement, Expense   $ 451,000 $ 1,128,000
Stock Issued During Period, Shares, Stock Swaps (in shares)   0 38
Stock Issued During Period, Shares, Stock Swaps Equity Instruments Received (in shares)     531
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   842,250  
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)   $ 1.42  
Subsequent Event [Member] | Share-Based Payment Arrangement, Employee [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 300,000    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) $ 0.9    
Subsequent Event [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Option [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years