Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	No Par, Common Stock	Retained Earnings (Accumulated deficit)	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2017		8,520,328.000
Balance at beginning of period at Dec. 31, 2017	$ 52,826	$ 86,199	$ (33,010)	$ (363)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	213		213
Restricted stock unit expense, net (in shares)		0
Restricted stock unit expense, net	231	$ 231
Other comprehensive income (loss)	(1,846)			(1,846)
Balance at end of period (in shares) at Mar. 31, 2018		8,520,328.000
Balance at end of period at Mar. 31, 2018	51,424	$ 86,430	(32,318)	(2,688)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(9,440)		(9,440)
Repurchase of common stock (in shares)		(137,228)
Repurchase of common stock	(636)	$ (636)
Restricted stock unit expense, net (in shares)		95,102
Restricted stock unit expense, net	739	$ 739
Other comprehensive income (loss)	76			76
Balance at end of period (in shares) at Dec. 31, 2018		8,478,202
Balance at end of period at Dec. 31, 2018	42,163	$ 86,533	(41,758)	(2,612)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(680)		(680)
Repurchase of common stock (in shares)		(125,151)
Repurchase of common stock	(510)	$ (510)
Restricted stock unit expense, net (in shares)		0
Restricted stock unit expense, net	245	$ 245
Other comprehensive income (loss)	1,697			1,697
Balance at end of period (in shares) at Mar. 31, 2019		8,353,051
Balance at end of period at Mar. 31, 2019	$ 42,915	$ 86,268	$ (42,438)	$ (915)