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Note 15 - Stock Option Plans - Stock Option Transactions (Details) - $ / shares
 12 Months Ended 24 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2022
Outstanding, Number of shares (in shares) 904,151 845,020 754,497 845,020
Outstanding, Weighted average exercise price per share (in dollars per share) $ 64.36 $ 55.31 $ 49.94 $ 55.31
Granted, Number of shares (in shares) 262,980 282,625 239,325  
Granted, Weighted average exercise price per share (in dollars per share) $ 42.15 $ 79.30 $ 61.21  
Exercised, Number of shares (in shares) (40,459) (179,321) (113,132)  
Exercised, Weighted average exercise price per share (in dollars per share) $ 31.95 $ 45.04 $ 30.53  
Forfeited, Number of shares (in shares) (55,234) (41,240) (26,468)  
Forfeited, Weighted average exercise price per share (in dollars per share) $ 68.11 $ 65.72 $ 60.29  
Expired, Number of shares (in shares) (34,690) (2,933) (9,202)  
Expired, Weighted average exercise price per share (in dollars per share) $ 58.92 $ 60.70 $ 58.96  
Outstanding, Number of shares (in shares) 1,036,748 904,151 845,020 1,036,748
Outstanding, Weighted average exercise price per share (in dollars per share) $ 59.97 $ 64.36 $ 55.31 $ 59.97
Options exercisable, Number of shares (in shares) 520,679 415,925 401,345 520,679
Options exercisable, Weighted average exercise price per share (in dollars per share) $ 62.74 $ 56.44 $ 49.21 $ 62.74
The 2022 Wavelo Equity Compensation Plan [Member]        
Outstanding, Number of shares (in shares) 0      
Granted, Number of shares (in shares) 15,975,528      
Granted, Weighted average exercise price per share (in dollars per share)       1.27
Exercised, Number of shares (in shares) 0      
Exercised, Weighted average exercise price per share (in dollars per share)       0
Forfeited, Number of shares (in shares) 0      
Forfeited, Weighted average exercise price per share (in dollars per share)       0
Expired, Number of shares (in shares) 0      
Expired, Weighted average exercise price per share (in dollars per share)       $ 0
Outstanding, Number of shares (in shares) 15,975,528 0   15,975,528
Outstanding, Weighted average exercise price per share (in dollars per share) $ 1.27     $ 1.27
Options exercisable, Number of shares (in shares) 0     0
Options exercisable, Weighted average exercise price per share (in dollars per share) $ 0     $ 0