CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified		Total		Common Stock		Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total Stockholders’ Equity	Noncontrolling Interest in Subsidiary
Beginning Balance at Dec. 31, 2009		$ 202,106		$ 337		$ 209,440	$ 0	$ (7,671)	$ 202,106	$ 0
Beginning Balance (shares) at Dec. 31, 2009				33,707,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to the employee stock purchase plan (shares)				50,000
Issuance of common stock pursuant to the employee stock purchase plan		359		1		358	0	0	359	0
Issuance of restricted common stock, net of cancellations (shares)				115,000
Issuance of restricted common stock, net of cancellations		1		1		0	0	0	1	0
Foreign currency translation adjustment		0
Surrender of restricted common stock for income tax purposes (shares)				(191,000)
Surrender of restricted common stock for income tax purposes		(1,706)		(2)		(1,704)	0	0	(1,706)	0
Issuance of common stock in connection with the exercise of vested stock options (shares)				385,000
Issuance of common stock in connection with the exercise of vested stock options		111		4		107	0	0	111	0
Issuance of common stock in connection with warrants (shares)				202,000
Issuance of common stock in connection with warrants		765		2		763	0	0	765	0
Stock-based compensation		3,960		0		3,960	0	0	3,960	0
Excess tax benefits from stock-based awards		1,126		0		1,126	0	0	1,126	0
Net income		3,654		0		0	0	3,654	3,654	0
Ending Balance at Dec. 31, 2010		210,376		343		214,050	0	(4,017)	210,376	0
Ending 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		0		0	0	0	0	588
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		0		297	0	0	297	0
Issuance of restricted common stock, net of cancellations (shares)				932,000
Issuance of restricted common stock, net of cancellations		9		9		0	0	0	9	0
Foreign currency translation adjustment		0
Surrender of restricted common stock for income tax purposes (shares)				(151,000)
Surrender of restricted common stock for income tax purposes		(1,559)		(1)		(1,558)	0	0	(1,559)	0
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		0		39	0	0	39	0
Repurchase of common stock (shares)				(7,460,000)
Repurchase of common stock		(71,180)		(75)		(46,214)	0	(24,891)	(71,180)	0
Stock-based compensation		5,933		0		5,933	0	0	5,933	0
Excess tax benefits from stock-based awards		388		0		388	0	0	388	0
Net income		5,988		0		0	0	6,040	6,040	(52)
Ending Balance at Dec. 31, 2011		150,879		276		172,935	0	(22,868)	150,343	536
Ending Balance (shares) at Dec. 31, 2011		27,648,994		27,649,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Initial fair value of noncontrolling interest in subsidiary		0		0		471	0	0	471	(471)
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		1		289	0	0	290	0
Issuance of restricted common stock, net of cancellations (shares)				483,000
Issuance of restricted common stock, net of cancellations		5		5		0	0	0	5	0
Foreign currency translation adjustment		(97)		0		0	(97)	0	(97)	0
Surrender of restricted common stock for income tax purposes (shares)				(211,000)
Surrender of restricted common stock for income tax purposes		(1,947)		(2)		(1,945)	0	0	(1,947)	0
Issuance of common stock in connection with the exercise of vested stock options (shares)		0	[1]	0
Issuance of common stock in connection with the exercise of vested stock options		1		0		1	0	0	1	0
Repurchase of common stock (shares)				(2,109,000)
Repurchase of common stock		(18,936)		(21)		(13,181)	0	(5,734)	(18,936)	0
Stock-based compensation		6,388		0		6,388	0	0	6,388	0
Excess tax benefits from stock-based awards		(386)		0		(386)	0	0	(386)	0
Deconsolidation of subsidiary		(339)		0		(500)	0	161	(339)	0
Net income		8,649		0		0	0	8,714	8,714	(65)
Ending Balance at Dec. 31, 2012	[2]	$ 144,507		$ 259		$ 164,071	$ (97)	$ (19,726)	$ 144,507	$ 0
Ending Balance (shares) at Dec. 31, 2012		25,853,425		25,853,000	[2]

[1] number of options exercised during current year rounds to zero, in thousands

[2] Amounts may not add due to rounding