Note 11 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Balances of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 251,157	$ 245,879
Balance	260,889	251,157
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	45	(1,046)
Other comprehensive income before reclassifications	428	1,072
Amounts reclassified from accumulated other comprehensive income (loss)	5	19
Net current period other comprehensive income (loss)	433	1,091
Balance	478	45
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	49	(68)
Other comprehensive income before reclassifications	556	388
Amounts reclassified from accumulated other comprehensive income (loss)	(605)	(271)
Net current period other comprehensive income (loss)	(49)	117
Balance	0	49
AOCI Attributable to Parent [Member]
Balance	94	(1,114)
Other comprehensive income before reclassifications	984	1,460
Amounts reclassified from accumulated other comprehensive income (loss)	(600)	(252)
Net current period other comprehensive income (loss)	384	1,208
Balance	$ 478	$ 94