Note 3 - Accumulated Other Comprehensive Income - Components of 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
Balance	$ 191,635	$ 175,887	$ 189,479	$ 162,950
Other comprehensive (loss) income, net of tax	989	(2,330)	(458)	5,884
Balance	195,692	177,744	195,692	177,744
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(42,668)	(45,862)	(40,760)	(53,624)
Other comprehensive (loss) income before reclassifications, net of tax	529	(2,779)	(1,379)	4,982
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0	0	1
Other comprehensive (loss) income, net of tax	529	(2,779)	(1,379)	4,983
Balance	(42,139)	(48,641)	(42,139)	(48,641)
AOCI, Gain (Loss), Debt Securities, Securities Transferred To Held-to-maturity [Member]
Balance	(15,246)	(17,076)	(15,707)	(17,528)
Other comprehensive (loss) income before reclassifications, net of tax	0	0	0	0
Amounts reclassified from accumulated other comprehensive income, net of tax	460	449	921	901
Other comprehensive (loss) income, net of tax	460	449	921	901
Balance	(14,786)	(16,627)	(14,786)	(16,627)
AOCI Attributable to Parent [Member]
Balance	(57,914)	(62,938)	(56,467)	(71,152)
Other comprehensive (loss) income before reclassifications, net of tax	529	(2,779)	(1,379)	4,982
Amounts reclassified from accumulated other comprehensive income, net of tax	460	449	921	902
Other comprehensive (loss) income, net of tax	989	(2,330)	(458)	5,884
Balance	$ (56,925)	$ (65,268)	$ (56,925)	$ (65,268)