Note 10 - Stock Based Compensation - Nonvested Restricted Stock Activity (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Nonvested, shares (in shares) | shares	58,461
Nonvested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 31.91
Granted, shares (in shares) | shares	33,073
Granted, weighted average grant date value per share (in dollars per share) | $ / shares	$ 36.10
Vested, shares (in shares) | shares	(15,053)
Vested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 32.58
Forfeited, shares (in shares) | shares	(747)
Forfeited, weighted average grant date value per share (in dollars per share) | $ / shares	$ 33.15
Nonvested, shares (in shares) | shares	75,734
Nonvested, weighted average grant date value per share (in dollars per share) | $ / shares	$ 33.59