Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unrealized loss on securities, pre-tax	$ (646)	$ (6,011)	$ (4,021)
Reclassification adjustment for securities losses (gains), pre-tax	146	(656)	(108)
Reclassification adjustment for impairment charge, pre-tax		7	3
Amortization of net unrealized holding losses to income during the period, pre-tax	$ 163	$ 219	$ 173