Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Employee Stock Plans - Summary of RSU Activity (Details)

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Note 13 - Employee Stock Plans - Summary of RSU Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Unvested, shares (in shares) 79,903  
Unvested, weighted average grant date fair value (in dollars per share) $ 48.87  
Unvested, contractual term (Year) 1 year 11 months 26 days 1 year 10 months 28 days
Granted, shares (in shares) 115,005  
Granted, weighted average grant date fair value (in dollars per share) $ 36.72  
Granted, contractual term (Year) 1 year 5 months 1 day  
Vested, shares (in shares) (77,535)  
Vested, weighted average grant date fair value (in dollars per share) $ 40.97  
Cancelled and forfeited, shares (in shares) (6,938)  
Cancelled and forfeited, weighted average grant date fair value (in dollars per share) $ 46.94  
Unvested, shares (in shares) 110,435 79,903
Unvested, weighted average grant date fair value (in dollars per share) $ 41.89 $ 48.87
Expected to vest in the future, shares (in shares) 107,527  
Expected to vest in the future, weighted average grant date fair value (in dollars per share) $ 41.89  
Expected to vest in the future, contractual term (Year) 1 year 11 months 26 days