Note 3 - Accumulated Other Comprehensive Income - Amount Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Gain (loss) on sale of investment securities	$ (6,468)	$ 4
Income before income taxes	20,256	35,468
Provision for income taxes	2,046	5,447
Net income	18,210	30,021
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Gain (loss) on sale of investment securities	(6,468)	4
Interest income on investment securities	(2,305)	(1,695)
Income before income taxes	(8,773)	(1,691)
Provision for income taxes	1,842	355
Net income	$ (6,931)	$ (1,336)