CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Noncontrolling Interest in Subsidiary
Beginning Balance at Dec. 31, 2011	$ 150,879	$ 150,343	$ 276	$ 172,935	$ 0	$ (22,868)	$ 536
Beginning Balance (shares) at Dec. 31, 2011			27,649,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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	290	1	289	0	0	0
Issuance of restricted common stock, net of cancellations (shares)			483,000
Issuance of restricted common stock, net of cancellations	5	5	5	0	0	0	0
Foreign currency translation adjustments, shares			0
Foreign currency translation adjustments	(97)	(97)	0	0	(97)	0	0
Surrender of restricted common stock for income tax purposes (shares)			(211,000)
Surrender of restricted common stock for income tax purposes	(1,947)	(1,947)	(2)	(1,945)	0	0	0
Issuance of common stock in connection with the exercise of vested stock options, shares			0
Issuance of common stock in connection with the exercise of vested stock options	1	1	0	1	0	0	0
Repurchase of common stock (shares)			(2,109,000)
Repurchase of common stock and extinguishment	(18,936)	(18,936)	(21)	(13,182)	0	(5,733)	0
Stock-based compensation, shares			0
Stock-based compensation	6,388	6,388	0	6,388	0	0	0
Excess tax benefits from stock-based awards	(386)	(386)	0	(386)	0	0	0
Acquisition of noncontrolling interest in subsidiary, shares			0
Acquisition of noncontrolling interest in subsidiary	0	471	0	471	0	0	(471)
Deconsolidation of subsidiary	(339)	(339)	0	(500)	0	161	0
Net income	8,649	8,714	0	0	0	8,714	(65)
Ending Balance at Dec. 31, 2012	144,507	144,507	259	164,071	(97)	(19,726)	0
Ending Balance (shares) at Dec. 31, 2012			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	298	0	298	0	0	0
Issuance of restricted common stock, net of cancellations (shares)			1,275,000
Issuance of restricted common stock, net of cancellations	13	13	13	0	0	0	0
Foreign currency translation adjustments, shares			0
Foreign currency translation adjustments	(107)	(107)	0	0	(107)	0	0
Surrender of restricted common stock for income tax purposes (shares)			(187,000)
Surrender of restricted common stock for income tax purposes	(1,782)	(1,782)	(2)	(1,780)	0	0	0
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	197	0	197	0	0	0
Stock-based compensation, shares			0
Stock-based compensation	6,665	6,665	0	6,665	0	0	0
Excess tax benefits from stock-based awards	305	305	0	305	0	0	0
Net income	5,794	5,794	0	0	0	5,794	0
Ending Balance at Dec. 31, 2013	155,890	155,890	270	169,756	(204)	(13,932)	0
Ending Balance (shares) at Dec. 31, 2013	27,049,095		27,049,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to the employee stock purchase plan (shares)			38,000
Issuance of common stock pursuant to the employee stock purchase plan	374	374	0	374	0	0	0
Issuance of restricted common stock, net of cancellations (shares)			(82,000)
Issuance of restricted common stock, net of cancellations	0	0	0	0	0	0	0
Foreign currency translation adjustments, shares			0
Foreign currency translation adjustments	(64)	(64)	0	0	(64)	0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	303	303			303
Surrender of restricted common stock for income tax purposes (shares)			(384,000)
Surrender of restricted common stock for income tax purposes	(4,796)	(4,796)	(3)	(4,793)	0	0	0
Issuance of common stock in connection with the exercise of vested stock options, shares	131,000		131,000
Issuance of common stock in connection with the exercise of vested stock options	523	523	1	522	0	0	0
Repurchase of common stock (shares)			(121,000)
Repurchase of common stock and extinguishment	(1,628)	(1,628)	(1)	(770)	0	(857)	0
Stock-based compensation, shares			0
Stock-based compensation	5,602	5,602	0	5,602	0	0	0
Excess tax benefits from stock-based awards	1,260	1,260	0	1,260	0	0	0
Net income	462	462				462	0
Ending Balance at Dec. 31, 2014	$ 157,926	$ 157,926	$ 267	$ 171,951	$ 35	$ (14,327)	$ 0
Ending Balance (shares) at Dec. 31, 2014	26,630,507		26,631,000