Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Non-controlling Interests	Total
Balance at Dec. 31, 2012	$ 4	$ 178,219	$ (34,547)		$ 823	$ 144,499
Balance (in shares) at Dec. 31, 2012	35,483,000
Issuance of common stock under stock incentive plans		599				599
Issuance of common stock under stock incentive plans (in shares)	465,000
Repurchase and retirement of common stock			(4,848)			$ (4,848)
Repurchase and retirement of common stock (in shares)	(722,000)					(722,000)
Stock-based compensation expense		4,506				$ 4,506
Deficient tax benefits from stock-based compensation		(397)				(397)
Non-controlling interests distributions					(608)	(608)
Net loss			(3,968)		650	(3,318)
Balance at Dec. 31, 2013	$ 4	182,927	(43,363)		865	140,433
Balance (in shares) at Dec. 31, 2013	35,226,000
Issuance of common stock under stock incentive plans		1,158				1,158
Issuance of common stock under stock incentive plans (in shares)	1,041,000
Shares withheld for taxes		(1,922)				(1,922)
Stock-based compensation expense		7,562				7,562
Non-controlling interests distributions					(623)	(623)
Net loss			(19,521)		754	(18,767)
Other comprehensive loss				$ (443)	32	(411)
Balance at Dec. 31, 2014	$ 4	189,725	(62,884)	(443)	1,028	$ 127,430
Balance (in shares) at Dec. 31, 2014	36,267,000					36,267,000
Issuance of common stock under stock incentive plans		1,373				$ 1,373
Issuance of common stock under stock incentive plans (in shares)	1,058,000
Shares withheld for taxes		(2,512)				(2,512)
Stock-based compensation expense		10,176				10,176
Purchase of non-controlling interests		(1,150)				(1,150)
Non-controlling interests distributions					(500)	(500)
Net loss			(22,292)		114	(22,178)
Other comprehensive loss				(717)	113	(604)
Balance at Dec. 31, 2015	$ 4	$ 197,612	$ (85,176)	$ (1,160)	$ 755	$ 112,035
Balance (in shares) at Dec. 31, 2015	37,325,000					37,325,000