Note 3 - Accumulated Other Comprehensive Income - Amount Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Gain (loss) on sale of investment securities	$ 0	$ 0	$ 0	$ (1)
Income before income taxes	5,701	5,967	11,453	14,219
Provision for income taxes	766	605	1,460	1,817
Net income	4,935	5,362	9,993	12,402
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	0	0	0	(1)
Interest income on investment securities	(582)	(568)	(1,166)	(1,140)
Income before income taxes	(582)	(568)	(1,166)	(1,141)
Provision for income taxes	122	119	245	239
Net income	$ (460)	$ (449)	$ (921)	$ (902)