Note 15 - Accumulated Other Comprehensive (Loss) Income - Other Comprehensive (loss) Income by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024		Mar. 31, 2023
Balance	$ 440,208	[1]	$ 354,530
Balance	454,281		369,546
Accumulated Pension Plan Adjustment Net Unamortized Gain (Loss) [Member]
Balance	19		(23)
Other comprehensive (loss) income before reclassification	0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive (loss) income	0		0
Balance	19		(23)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Balance	147		172
Other comprehensive (loss) income before reclassification	0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive (loss) income	0		0
Balance	147		172
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	15,820		20,867
Other comprehensive (loss) income before reclassification	1,350		(3,136)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive (loss) income	1,350		(3,136)
Balance	17,170		17,731
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(29,211)		(37,901)
Other comprehensive (loss) income before reclassification	(2,766)		7,493
Amounts reclassified from accumulated other comprehensive loss, net of tax	71		45
Net current period other comprehensive (loss) income	(2,695)		7,538
Balance	(31,906)		(30,363)
AOCI Accumulated Gain (Loss) Securities Fair Value Hedge Parent [Member]
Balance	5,740		5,406
Other comprehensive (loss) income before reclassification	1,581		(948)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive (loss) income	1,581		(948)
Balance	7,321		4,458
AOCI Attributable to Parent [Member]
Balance	(7,485)		(11,479)
Other comprehensive (loss) income before reclassification	165		3,409
Amounts reclassified from accumulated other comprehensive loss, net of tax	71		45
Net current period other comprehensive (loss) income	236		3,454
Balance	$ (7,249)		$ (8,025)

[1] Derived from audited consolidated financial statements.