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Note 13 - Equity Incentive Plan - Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights (Details) - $ / shares
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Expected life (years) (Year) 4 years 6 months 4 years 6 months
Expected dividend yield 0.00% 0.00%
Fair value per option (in dollars per share) $ 5.13 $ 10.53
Minimum [Member]    
Risk free interest rate 3.70% 3.60%
Expected volatility 41.60% 44.50%
Maximum [Member]    
Risk free interest rate 4.00% 4.60%
Expected volatility 45.70% 48.20%