Note 9 - Components of Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassifications out of unrealized gains and losses on available-for-sale securities:
Realized securities gain, net	$ (46)	$ (5)	$ (52)	$ (3)
Reclassification adjustment for gain included in net income, taxes	(16)	(2)	(18)	(1)
Reclassification adjustment, net of tax	$ (30)	$ (3)	$ (34)	$ (2)