Note 10 - Stock Based Compensation - Nonvested Restricted Stock Activity (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Nonvested, shares (in shares) | shares	71,707
Nonvested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 33.39
Granted, shares (in shares) | shares	32,554
Granted, weighted average grant date value per share (in dollars per share) | $ / shares	$ 36.50
Vested, shares (in shares) | shares	(13,698)
Vested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 36.84
Forfeited, shares (in shares) | shares	(104)
Forfeited, weighted average grant date value per share (in dollars per share) | $ / shares	$ 35.24
Nonvested, shares (in shares) | shares	90,459
Nonvested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 33.98