CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Noncontrolling Interest
Beginning Balances at Dec. 31, 2014	$ 46,132	$ 11	$ 389,401	$ (4,572)	$ (338,670)	$ 1,699	$ (1,737)
Beginning Balances (in shares) at Dec. 31, 2014		10,640
Net loss	(39,220)				(39,144)		(76)
Other comprehensive loss	971					974	(3)
Issuance of common stock in connection with settlement of earnout	3,510		3,510
Issuance of common stock in connection with settlement of earnout (in shares)		326
Issuance of common stock to acquire share of noncontrolling interest			(1,216)			(444)	1,660
Issuance of common stock to acquire share of noncontrolling interest (in shares)		95
Issuance of common stock in connection with exercise of options and warrants	46		46
Issuance of common stock in connection with exercise of options and warrants (in shares)		60
Stock-based compensation	4,515		4,515
Issuance of warrants	151		151
Repurchase of common stock	(1,915)			(1,915)
Repurchase of common stock (in shares)		(374)
Ending Balances at Dec. 31, 2015	$ 14,190	$ 11	396,407	(6,487)	(377,814)	2,229	(156)
Ending Balances (in shares) at Dec. 31, 2015	10,747	10,747
Net loss	$ (13,703)				(13,695)		(8)
Other comprehensive loss	(192)					(176)	(16)
Issuance of common stock in connection with vesting of stock awards (shares)		471
Stock-based compensation	3,290		3,290
Issuance of warrants	569		569
Repurchase of common stock	(221)			(221)
Repurchase of common stock (in shares)		(109)
Ending Balances at Dec. 31, 2016	$ 3,933	$ 11	$ 400,266	$ (6,708)	$ (391,509)	$ 2,053	$ (180)
Ending Balances (in shares) at Dec. 31, 2016	11,109	11,109