Note 15 - Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Balance	$ 321,174	[1]	$ 354,792
Balance	329,041		335,074
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(55,710)		(1,701)
Net unrealized gains (losses) on securities available for sale, net of tax	6,737		(24,199)
Net unrealized gains on cash flow hedges, net of tax	0		0
Reclassification adjustment for realized gains on securities, net of tax	61
Balance	(48,912)		(25,900)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	1,047		(2,212)
Net unrealized gains (losses) on securities available for sale, net of tax	0		0
Net unrealized gains on cash flow hedges, net of tax	(439)		1,489
Reclassification adjustment for realized gains on securities, net of tax	0
Balance	608		(723)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(313)		(1,162)
Net unrealized gains (losses) on securities available for sale, net of tax	0		0
Net unrealized gains on cash flow hedges, net of tax	0		0
Reclassification adjustment for realized gains on securities, net of tax	0
Balance	(313)		(1,162)
AOCI Attributable to Parent [Member]
Balance	(54,976)		(5,075)
Net unrealized gains (losses) on securities available for sale, net of tax	6,737		(24,199)
Net unrealized gains on cash flow hedges, net of tax	(439)		1,489
Reclassification adjustment for realized gains on securities, net of tax	61
Balance	$ (48,617)		$ (27,785)

[1] Derived from audited consolidated financial statements