Note 11 - Stock-based Compensation Plan - Unvested Stock Activity (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Unvested shares outstanding (in shares) | shares	189,784
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 11.51
Granted, number of shares (in shares) | shares	138,838
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 11.38
Vested, number of shares (in shares) | shares	(39,790)
Vested, weighted average exercise price (in dollars per share) | $ / shares	$ 11.52
Forfeited, number of shares (in shares) | shares	(11,200)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 12.29
Unvested shares outstanding (in shares) | shares	277,632
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 11.41