CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Accumulated Deficit	AOCI Attributable to Parent	Common Stock	Additional Paid-in Capital	Treasury Stock
Balance at Dec. 31, 2016	$ 169,777	$ (626,904)	$ (431)	$ 2,157	$ 816,016	$ (21,061)
Balance (in shares) at Dec. 31, 2016				21,573
Balance (in shares) at Dec. 31, 2016						1,209
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(22,097)	(22,097)
Stock options exercised, net of tax withholdings	10				(10)	$ 20
Stock options exercised, net of tax withholdings (in shares)						(1)
Issuance of restricted stock, net of tax withholdings	(57)				25	$ (82)
Issuance of restricted stock, net of tax withholdings (in shares)						7
Stock-based compensation expense	(105)				(105)
Other comprehensive income	48		48
Balance at Mar. 31, 2017	$ 147,576	$ (649,001)	$ (383)	$ 2,157	$ 815,926	$ (21,123)
Balance (in shares) at Mar. 31, 2017				21,573
Balance (in shares) at Mar. 31, 2017						1,215