Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	No Par, Common Stock	Accumulated deficit	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2015		7,644,492
Balance at beginning of period at Dec. 31, 2015	$ 77,262	$ 80,111	$ (3,031)	$ 182
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,016)		(4,016)
Repurchase of common stock (in shares)		(88,650)
Repurchase of common stock	(625)	$ (625)
Restricted stock unit expense (in shares)		75,388
Restricted stock unit expense	621	$ 621
Other comprehensive loss	1,262			1,262
Balance at end of period (in shares) at Sep. 30, 2016		7,631,230
Balance at end of period at Sep. 30, 2016	74,504	$ 80,107	(7,047)	1,444
Balance at beginning of period at Jun. 30, 2016				1,504
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,475)
Other comprehensive loss	(60)
Balance at end of period (in shares) at Sep. 30, 2016		7,631,230
Balance at end of period at Sep. 30, 2016	74,504	$ 80,107	(7,047)	1,444
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,421)		(4,421)
Restricted stock unit expense (in shares)		1,840
Restricted stock unit expense	235	$ 235
Other comprehensive loss	(2,524)			(2,524)
Balance at end of period (in shares) at Dec. 31, 2016		7,633,070
Balance at end of period at Dec. 31, 2016	67,794	$ 80,342	(11,468)	(1,080)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21,763)		(21,763)
Restricted stock unit expense (in shares)		85,418
Restricted stock unit expense	650	$ 650
Other comprehensive loss	826			826
Issuance of common stock private placement (in shares)		800,000
Issuance of common stock private placement	5,000	$ 5,000
Private placement expenses	(13)	$ (13)
Balance at end of period (in shares) at Sep. 30, 2017		8,518,488.000
Balance at end of period at Sep. 30, 2017	52,494	$ 85,979	(33,231)	(254)
Balance at beginning of period at Jun. 30, 2017				(507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(18,898)
Other comprehensive loss	253
Balance at end of period (in shares) at Sep. 30, 2017		8,518,488.000
Balance at end of period at Sep. 30, 2017	$ 52,494	$ 85,979	$ (33,231)	$ (254)