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Note 15 - Stock Option Plans - Fair Value of Stock Options Granted (Details) - $ / shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Volatility 34.90% 35.70% 39.00%
Risk-free interest rate 3.40% 0.80% 1.80%
Expected life (in years) (Year) 4 years 7 months 6 days 4 years 7 months 6 days 4 years 6 months 14 days
Dividend yield 0.00% 0.00% 0.00%
The weighted average grant date fair value for options issued, with the exercise price equal to market value on the date of grant (in dollars per share) $ 14.93 $ 24.83 $ 19.98
The 2022 Wavelo Equity Compensation Plan [Member]      
Volatility 40.70%    
Risk-free interest rate 4.40%    
Expected life (in years) (Year) 4 years 1 month 28 days    
Dividend yield 0.00%    
The weighted average grant date fair value for options issued, with the exercise price equal to market value on the date of grant (in dollars per share) $ 0.49