Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (27,516)	$ (11,761)
Unrealized losses on securities available-for-sale:
Unrealized holding losses arising during the year	(2,335)	(503)
Less: reclassification adjustment for securities transferred from held-to-maturity to available-for-sale	58	0
Less: reclassification adjustment for net loss (gain) on sales of securities available-for-sale	49	(347)
Net change in unrealized losses on securities available-for-sale	(2,228)	(850)
Unrealized gain on derivative instruments designated as cash flow hedges:
Unrealized holdings gains on derivatives arising during the period	257	106
Less: reclassification adjustment for gains on derivative instruments	(267)	(17)
Net change in unrealized (loss) gain on derivative instruments	(10)	89
Total other comprehensive loss, before tax	(2,238)	(761)
Income tax effect related to items of other comprehensive loss	0	267
Total other comprehensive loss, net of tax	(2,238)	(494)
Total comprehensive loss	$ (29,754)	$ (12,255)