Condensed Consolidated Statement of Stockholders' Equity Statement - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance, shares at Dec. 31, 2016		49,251,000
Beginning balance at Dec. 31, 2016	$ (20,696)	$ 49	$ 146,615	$ (166,800)	$ (560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,479)			(17,479)
Other comprehensive income	$ 269				269
Stock options exercised and related tax activity, shares	0
Share-based compensation	$ 1,187		1,187
Ending balance, shares at Sep. 30, 2017		49,386,000
Ending balance at Sep. 30, 2017	$ (36,719)	$ 49	$ 147,802	$ (184,279)	$ (291)