Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional paid-in capital	Treasury Stock	Accumulated other comprehensive income (loss)	Accumulated deficit	Total
Beginning balance at Dec. 31, 2016	$ 2	$ 513,139	$ (35,641)	$ (112)	$ (397,638)	$ 79,750
Beginning Balance (in shares) at Dec. 31, 2016	19,763					19,763
Issuance of stock under employee stock awards and other		291				$ 291
Issuance of stock under employee stock awards and other (in shares)	378
Repurchases of common stock to be held in treasury			(65)			(65)
Repurchases of common stock to be held in treasury (in shares)	(10)
Tax withholdings related to vesting of share-based payments		(1,774)				(1,774)
Stock-based compensation		2,163				2,163
Foreign currency translation adjustment				14		14
Net loss					(10,018)	(10,018)
Ending balance at Mar. 31, 2017	$ 2	$ 513,819	$ (35,706)	$ (98)	$ (407,656)	$ 70,361
Ending Balance (in shares) at Mar. 31, 2017	20,131					20,131