Note 13 - Stock-based Compensation Plan - Unvested Stock Activity (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Unvested shares outstanding (in shares) | shares	262,533
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 7.16
Granted, number of shares (in shares) | shares	123,533
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 9.21
Vested, number of shares (in shares) | shares	(82,672)
Vested, weighted average exercise price (in dollars per share) | $ / shares	$ 7.85
Forfeited, number of shares (in shares) | shares	(5,944)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 9.16
Unvested shares outstanding (in shares) | shares	297,450
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 7.86