Note 13 - Accumulated Other Comprehensive Income (Loss) - Activity in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 94,806	$ 83,616
Balance	121,659	94,806
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	227	234
Other comprehensive income (loss), before reclassifications and income taxes	296	1,207
Amounts reclassified from accumulated other comprehensive income (loss), before income taxes	(605)	(1,223)
Income tax benefit (provision)	82	9
Total other comprehensive loss	(227)	(7)
Balance		227
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	(1,338)	79
Other comprehensive income (loss), before reclassifications and income taxes	3,689	(2,113)
Amounts reclassified from accumulated other comprehensive income (loss), before income taxes	(69)	187
Income tax benefit (provision)	(953)	509
Total other comprehensive loss	2,667	(1,417)
Balance	1,329	(1,338)
AOCI Attributable to Parent [Member]
Balance	(1,111)	313
Other comprehensive income (loss), before reclassifications and income taxes	3,985	(906)
Amounts reclassified from accumulated other comprehensive income (loss), before income taxes	(674)	(1,036)
Income tax benefit (provision)	(871)	518
Total other comprehensive loss	2,440	(1,424)
Balance	$ 1,329	$ (1,111)