Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Dec. 31, 2008	$ 91,408	$ 194	$ 129,897	$ (10,783)	$ 564	$ (28,464)
Balance, shares at Dec. 31, 2008		19,380,866
Exercise of stock options	2,403	3	2,400
Exercise of stock options, shares		264,133
Vesting of restricted stock awards		2	(2)
Vesting of restricted stock awards, shares		209,586
Tax benefit (deficiency) from equity awards	4,088		4,088
Repurchase of 265,404, 918,681 and 978,709 shares of common stock for years 2009, 2010 and 2011 respectively	(4,131)			(4,131)
Stock-based compensation	12,896		12,896
Comprehensive loss:
Foreign currency translation	(225)				(225)
Net unrealized gain (loss) on available for sale securities, net of tax	(34)				(34)
Net loss	(2,024)					(2,024)
Total comprehensive loss	(2,283)
Balance at Dec. 31, 2009	104,381	199	149,279	(14,914)	305	(30,488)
Balance, shares at Dec. 31, 2009		19,854,585
Exercise of stock options	4,163	3	4,160
Exercise of stock options, shares		349,208
Vesting of restricted stock awards		2	(2)
Vesting of restricted stock awards, shares		170,474
Tax benefit (deficiency) from equity awards	681		681
Repurchase of 265,404, 918,681 and 978,709 shares of common stock for years 2009, 2010 and 2011 respectively	(13,503)			(13,503)
Stock-based compensation	12,867		12,867
Comprehensive loss:
Foreign currency translation	(474)				(474)
Net unrealized gain (loss) on available for sale securities, net of tax	(6)				(6)
Net loss	(3,675)					(3,675)
Total comprehensive loss	(4,155)
Balance at Dec. 31, 2010	104,434	204	166,985	(28,417)	(175)	(34,163)
Balance, shares at Dec. 31, 2010		20,374,267
Exercise of stock options	18,952	12	18,940
Exercise of stock options, shares		1,219,643
Vesting of restricted stock awards		2	(2)
Vesting of restricted stock awards, shares		156,615
Tax benefit (deficiency) from equity awards	(586)		(586)
Repurchase of 265,404, 918,681 and 978,709 shares of common stock for years 2009, 2010 and 2011 respectively	(20,006)			(20,006)
Stock-based compensation	14,936		14,936
Comprehensive loss:
Foreign currency translation	(442)				(442)
Net unrealized gain (loss) on available for sale securities, net of tax	10				10
Net loss	(14,577)					(14,577)
Total comprehensive loss	(15,009)
Balance at Dec. 31, 2011	$ 102,721	$ 218	$ 200,273	$ (48,423)	$ (607)	$ (48,740)
Balance, shares at Dec. 31, 2011		21,750,525