Note 13 - Stock-based Compensation Plan - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Options outstanding, number of shares (in shares)	580,419	408,869
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.91	$ 9.07
Granted, number of shares (in shares)	93,860	202,540
Granted, weighted average exercise price (in dollars per share)	$ 16.25	$ 8.45
Exercised, number of shares (in shares)	(124,550)	(8,060)
Exercised, weighted average exercise price (in dollars per share)	$ 7.85	$ 4.74
Canceled, number of shares (in shares)	(44,723)	(22,930)
Canceled, weighted average exercise price (in dollars per share)	$ 9.77	$ 9.1
Options outstanding, number of shares (in shares)	505,006	580,419
Options outstanding, weighted average exercise price (in dollars per share)	$ 10.46	$ 8.91