Note 8 - Share-based Compensation - Activity in Restricted Shares (Details) - Restricted Stock [Member]	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Nonvested, shares (in shares) | shares	85,931
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 26.20
Granted, shares (in shares) | shares	50,617
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 17.93
Vested, shares (in shares) | shares	(24,445)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 27.49
Forfeited/cancelled/expired, shares (in shares) | shares	(1,415)
Forfeited/cancelled/expired, weighted average grant date fair value (in dollars per share) | $ / shares	$ 29.46
Nonvested, shares (in shares) | shares	110,688
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 22.09