Note 6 - Share-based Compensation - Restricted Stock Transactions (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Outstanding (in shares) | shares	428,366
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 18.14
Granted (in shares) | shares	115,804
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 13.84
Vested (in shares) | shares	(13,039)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 25.78
Forfeited (in shares) | shares	0
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Outstanding (in shares) | shares	531,131
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 17.01