Note 16 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 122,687	$ 191,751
Net pension gain (loss) arising during the period, net of tax	(35)	(4,567)
Balance	140,522	122,687
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(81,421)	2,854
Unrealized holding gain (loss) on available for sale securities, net of tax	16,233	(84,275)
Reclassification adjustment, net of tax of $700	2,632
Balance	(62,556)	(81,421)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(2,345)	(6,912)
Net pension gain (loss) arising during the period, net of tax	35	4,567
Reclassification adjustment, net of tax of $700	0
Balance	(2,310)	(2,345)
AOCI Attributable to Parent [Member]
Balance	(83,766)	(4,058)
Unrealized holding gain (loss) on available for sale securities, net of tax	16,233	(84,275)
Net pension gain (loss) arising during the period, net of tax	35	4,567
Reclassification adjustment, net of tax of $700	2,632
Balance	$ (64,866)	$ (83,766)