Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (669)	$ (5,414)	$ (308)	$ (2,923)
Unrealized (losses) gains on securities available-for-sale:
Unrealized holding (loss) gains arising during the year	(873)	2,739	(4,922)	3,559
Less: reclassification adjustment for gains on sales of securities available-for-sale	0	(3)	0	(9)
Net change in unrealized (loss) gains on securities available-for-sale	(873)	2,736	(4,922)	3,550
Unrealized (loss) gain on derivative instruments designated as cash flow hedges:
Unrealized holding gains on derivatives arising during the period	152	(136)	502	(123)
Less: reclassification adjustment for gains on derivative instruments	(63)	0	(102)	0
Net change in unrealized gain on derivative instruments	89	(136)	400	(123)
Total other comprehensive (loss) income, before tax	(784)	2,600	(4,522)	3,427
Income tax effect related to items of other comprehensive (loss) income	165	(910)	950	(1,200)
Total other comprehensive (loss) income, net of tax	(619)	1,690	(3,572)	2,227
Total comprehensive loss	$ (1,288)	$ (3,724)	$ (3,880)	$ (696)