CONSOLIDATED STATEMENT OF EQUITY (USD $)	Total	Total Stockholders’ Equity	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Noncontrolling Interest in Subsidiary
Beginning Balance at Dec. 31, 2010	$ 210,376,000	$ 210,376,000	$ 343,000	$ 214,050,000	$ 0	$ (4,017,000)	$ 0
Beginning Balance (shares) at Dec. 31, 2010			34,268,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Initial fair value of noncontrolling interest in subsidiary	588,000	0					588,000
Issuance of common stock pursuant to the employee stock purchase plan (shares)			40,000
Issuance of common stock pursuant to the employee stock purchase plan	297,000	297,000		297,000
Issuance of restricted common stock, net of cancellations (shares)			932,000
Issuance of restricted common stock, net of cancellations	9,000	9,000	9,000
Foreign currency translation adjustments	0
Surrender of restricted common stock for income tax purposes (shares)			(151,000)
Surrender of restricted common stock for income tax purposes	(1,559,000)	(1,559,000)	(1,000)	(1,558,000)
Issuance of common stock in connection with the exercise of vested stock options (shares)			20,000
Issuance of common stock in connection with the exercise of vested stock options	39,000	39,000		39,000
Repurchase of common stock (shares)			(7,460,000)
Repurchase of common stock	(71,180,000)	(71,180,000)	(75,000)	(46,214,000)		(24,891,000)
Stock-based compensation	5,933,000	5,933,000		5,933,000
Excess tax benefits from stock-based awards	388,000	388,000		388,000
Net Income (Loss) Attributable to Parent	6,040,000
Net income	5,988,000	6,040,000				6,040,000	(52,000)
Ending Balance at Dec. 31, 2011	150,879,000	150,343,000	276,000	172,935,000	0	(22,868,000)	536,000
Ending Balance (shares) at Dec. 31, 2011			27,649,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Initial fair value of noncontrolling interest in subsidiary	0	471,000		471,000			(471,000)
Issuance of common stock pursuant to the employee stock purchase plan (shares)			41,000
Issuance of common stock pursuant to the employee stock purchase plan	290,000	290,000	1,000	289,000
Issuance of restricted common stock, net of cancellations (shares)			483,000
Issuance of restricted common stock, net of cancellations	5,000	5,000	5,000
Foreign currency translation adjustments	(97,000)	(97,000)			(97,000)
Surrender of restricted common stock for income tax purposes (shares)			(211,000)
Surrender of restricted common stock for income tax purposes	(1,947,000)	(1,947,000)	(2,000)	(1,945,000)
Issuance of common stock in connection with the exercise of vested stock options	1,000	1,000		1,000
Repurchase of common stock (shares)			(2,109,000)
Repurchase of common stock	(18,936,000)	(18,936,000)	(21,000)	(13,181,000)		(5,734,000)
Stock-based compensation	6,388,000	6,388,000		6,388,000
Excess tax benefits from stock-based awards	(386,000)	(386,000)		(386,000)
Net Income (Loss) Attributable to Parent	8,714,000
Deconsolidation of subsidiary	(339,000)	(339,000)		(500,000)		161,000
Net income	8,649,000	8,714,000				8,714,000	(65,000)
Ending Balance at Dec. 31, 2012	144,507,000	144,507,000	259,000	164,071,000	(97,000)	(19,726,000)	0
Ending Balance (shares) at Dec. 31, 2012	25,853,425		25,853,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to the employee stock purchase plan (shares)			39,000
Issuance of common stock pursuant to the employee stock purchase plan	298,000	298,000		298,000
Issuance of restricted common stock, net of cancellations (shares)			1,274,000
Issuance of restricted common stock, net of cancellations	13,000	13,000	13,000
Foreign currency translation adjustments	(107,000)	(107,000)			(107,000)
Surrender of restricted common stock for income tax purposes (shares)			(187,000)
Surrender of restricted common stock for income tax purposes	(1,782,000)	(1,782,000)	(2,000)	(1,780,000)
Issuance of common stock in connection with the exercise of vested stock options (shares)	69,000		69,000
Issuance of common stock in connection with the exercise of vested stock options	197,000	197,000	1,000	196,000
Stock-based compensation	6,665,000	6,665,000		6,665,000
Excess tax benefits from stock-based awards	305,000	305,000		305,000
Net Income (Loss) Attributable to Parent	5,794,000
Net income	5,794,000	5,794,000				5,793,836
Ending Balance at Dec. 31, 2013	$ 155,890,000	$ 155,890,000	$ 270,000	$ 169,756,000	$ (204,000)	$ (13,932,000)	$ 0
Ending Balance (shares) at Dec. 31, 2013	27,049,095		27,049,000