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Note 12 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Balances of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Balance	$ 260,889	$ 251,157
Balance	261,649	249,272
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	478	45
Other comprehensive income before reclassifications	(360)	(621)
Amounts reclassified from accumulated other comprehensive income (loss)	0	1
Net current period other comprehensive income (loss)	(360)	(620)
Balance	118	(575)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	0	49
Other comprehensive income before reclassifications	(44)	177
Amounts reclassified from accumulated other comprehensive income (loss)	19	0
Net current period other comprehensive income (loss)	(25)	177
Balance	(25)	226
AOCI Attributable to Parent [Member]
Balance	478	94
Other comprehensive income before reclassifications	(404)	(444)
Amounts reclassified from accumulated other comprehensive income (loss)	19	1
Net current period other comprehensive income (loss)	(385)	(443)
Balance	$ 93	$ (349)

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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