Note 11 - Stock-based Compensation Plan - Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Options outstanding, number of shares (in shares) | shares	580,419
Options outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 8.91
Granted, number of shares (in shares) | shares	93,860
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 16.25
Exercised, number of shares (in shares) | shares	(124,550)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 7.85
Canceled, number of shares (in shares) | shares	(43,426)
Canceled, weighted average exercise price (in dollars per share) | $ / shares	$ 9.82
Options outstanding, number of shares (in shares) | shares	506,303
Options outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 10.45