Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 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		1,592				$ 1,592
Issuance of stock under employee stock awards and other (in shares)	703
Repurchases of common stock to be held in treasury			(65)			(65)
Repurchases of common stock to be held in treasury (in shares)	(10)
Issuance of common stock for acquisitions		1,603				1,603
Issuance of common stock for acquisitions (in shares)	215
Tax withholdings related to vesting of share-based payments		(2,350)				(2,350)
Stock-based compensation		4,418				4,418
Foreign currency translation adjustment				59		59
Net (loss) income					(18,983)	(18,983)
Ending balance at Jun. 30, 2017	$ 2	$ 518,402	$ (35,706)	$ (53)	$ (416,621)	$ 66,024
Ending Balance (in shares) at Jun. 30, 2017	20,671					20,671