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, 2022	Dec. 31, 2021
Balance	$ 191,751	$ 200,607
Net pension gain (loss) arising during the period, net of tax	(4,567)	(3,244)
Less amortization of prior service cost included in net periodic pension cost, net of tax	0	(9)
Balance	122,687	191,751
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	2,854	13,176
Unrealized holding gain (loss) on available for sale securities, net of tax	(84,275)	(10,308)
Reclassification adjustment for gains included in net income, net of tax of ($1)		(5)
Balance	(81,421)	2,854
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(6,912)	(10,147)
Net pension gain (loss) arising during the period, net of tax	4,567	3,244
Less amortization of prior service cost included in net periodic pension cost, net of tax		(9)
Balance	(2,345)	(6,912)
AOCI Attributable to Parent [Member]
Balance	(4,058)	3,020
Unrealized holding gain (loss) on available for sale securities, net of tax	(84,275)	(10,308)
Reclassification adjustment for gains included in net income, net of tax of ($1)		(5)
Net pension gain (loss) arising during the period, net of tax	4,567	3,244
Less amortization of prior service cost included in net periodic pension cost, net of tax		(9)
Balance	$ (83,766)	$ (4,058)