Note 12 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Balances of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Balance	$ 245,312	$ 252,815	$ 245,879	$ 244,670
Balance	244,645	244,366	244,645	244,366
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	(476)	(1,184)	(1,046)	(586)
Other comprehensive income (loss) before reclassifications	485	(159)	1,037	(754)
Amounts reclassified from accumulated other comprehensive income (loss)	8	1	26	(2)
Net current period other comprehensive income (loss)	493	(158)	1,063	(756)
Balance	17	(1,342)	17	(1,342)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	49	(4)	(68)
Other comprehensive income (loss) before reclassifications	99	(229)	280	(250)
Amounts reclassified from accumulated other comprehensive income (loss)	(101)	158	(165)	175
Net current period other comprehensive income (loss)	(2)	(71)	115	(75)
Balance	47	(75)	47	(75)
AOCI Attributable to Parent [Member]
Balance	(427)	(1,188)	(1,114)	(586)
Other comprehensive income (loss) before reclassifications	584	(388)	1,317	(1,004)
Amounts reclassified from accumulated other comprehensive income (loss)	(93)	159	(139)	173
Net current period other comprehensive income (loss)	491	(229)	1,178	(831)
Balance	$ 64	$ (1,417)	$ 64	$ (1,417)

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

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