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Note 14 - Stock-based Compensation - Information of Stock Options Granted, Exercised and Vested (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Weighted average fair value per share of options granted (in dollars per share)   $ 24  
Proceeds from exercise of stock options $ 3,731 $ 1,885 $ 1,326
Aggregate intrinsic value of options exercised 74,296 13,673  
Grant date fair value of shares vested $ 1,802 $ 834