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Note 16 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrealized holding gain (loss) on available for sale securities, tax			$ (595)
Transfer from held to maturity to available for sale securities, tax			237
Reclassification adjustment for gain included in net income, taxes	$ (23)
Net pension gain (loss) arising during the period, taxes	(393)	$ (394)	(249)
Amortization of prior service cost included in net periodic pension cost, tax	(23)	(23)	(24)
AOCI Attributable to Parent [Member]
Unrealized holding gain (loss) on available for sale securities, tax	$ 3,502	1,486
Reclassification adjustment for gain included in net income, taxes		$ (119)	$ (4)

X

- Definition

Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).

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Amount, before adjustment, of tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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