Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2010	$ 117,564	$ 1	$ 97,122	$ (14,708)	$ (36)	$ 35,185
Beginning Balance, Shares at Dec. 31, 2010		62,621,268		2,091,600
Stock options exercised and RSUs vested	1,427		1,427
Stock options exercised and RSUs vested, Shares		539,923
Stock-based compensation	3,038		3,038
Excess tax benefit from stock-based compensation	10		10
Purchase of treasury stock	(32,499)			(32,499)
Purchase of treasury stock, Shares	7,500,000	(7,464,583)		7,464,583
Net income (loss)	(7,040)					(7,040)
Foreign currency translation adjustments	(45)				(45)
Ending Balance at Dec. 31, 2011	82,455	1	101,597	(47,207)	(81)	28,145
Ending Balance, Shares at Dec. 31, 2011		55,696,608		9,556,183
Stock options exercised and RSUs vested	1,929		1,929
Stock options exercised and RSUs vested, Shares		881,390
Stock-based compensation	3,422		3,422
Excess tax benefit from stock-based compensation	4,713		4,713
Purchase of treasury stock	(19,996)			(19,996)
Purchase of treasury stock, Shares		(3,807,606)		3,807,606
Net income (loss)	14,738					14,738
Foreign currency translation adjustments	24				24
Ending Balance at Dec. 31, 2012	87,285	1	111,661	(67,203)	(57)	42,883
Ending Balance, Shares at Dec. 31, 2012		52,770,392		13,363,789
Stock options exercised and RSUs vested, net of withholdings	15,048		15,048
Stock options exercised and RSUs vested, net of withholdings, Shares		2,896,072
Stock-based compensation	4,340		4,340
Excess tax benefit from stock-based compensation	6,797		6,797
Purchase of treasury stock	(25,000)			(25,000)
Purchase of treasury stock, Shares		(3,048,966)		3,048,966
Shares issued related to business acquisition	1,578		1,578
Shares issued related to business acquisition, Shares		107,749
Net income (loss)	18,244					18,244
Foreign currency translation adjustments	55				55
Ending Balance at Dec. 31, 2013	$ 108,347	$ 1	$ 139,424	$ (92,203)	$ (2)	$ 61,127
Ending Balance, Shares at Dec. 31, 2013		52,725,247		16,412,755