Note 19 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance	$ 91,480	$ 85,858
Net current period other comprehensive income (loss)	(1,693)	1,851
Balance	96,959	91,480
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	2,220	(108)
Other comprehensive income (loss) before reclassification	(2,132)	2,871
Amounts reclassified from accumulated other comprehensive income (loss)	(194)	(543)
Net current period other comprehensive income (loss)	(2,326)	2,328
Balance	(106)	2,220
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(5,704)	(5,227)
Other comprehensive income (loss) before reclassification	402	(689)
Amounts reclassified from accumulated other comprehensive income (loss)	231	212
Net current period other comprehensive income (loss)	633	(477)
Balance	(5,071)	(5,704)
AOCI Attributable to Parent [Member]
Balance	(3,484)	(5,335)
Other comprehensive income (loss) before reclassification	(1,730)	2,182
Amounts reclassified from accumulated other comprehensive income (loss)	37	(331)
Net current period other comprehensive income (loss)	(1,693)	1,851
Balance	$ (5,177)	$ (3,484)