Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings (Deficit)
Beginning Balance at Dec. 31, 2009	$ 110,198	$ 154	$ 96,197	$ (265)	$ 14,112
Beginning Balance, Shares at Dec. 31, 2009		15,397,093
Net income (loss)	(10,066)				(10,066)
Net derivatives losses on interest rate swaps, net of tax	81			81
Employee stock purchase and option plans	170	1	169
Employee stock purchase and option plans, Shares		27,140
Repurchases of common stock	(1,089)		(1,089)
Repurchases of common stock, Shares		(54,922)
Stock-based compensation	3,628		3,628
Stock-based compensation, Shares		88,691
Ending Balance at Dec. 31, 2010	102,922	155	98,905	(184)	4,046
Ending Balance, Shares at Dec. 31, 2010		15,458,002
Net income (loss)	(11,588)				(11,588)
Net derivatives losses on interest rate swaps, net of tax	184			184
Employee stock purchase and option plans	1,427	1	1,426
Employee stock purchase and option plans, Shares		139,228
Repurchases of common stock	(3,092)		(3,092)
Repurchases of common stock, Shares		(62,543)
Stock-based compensation	3,146		3,146
Stock-based compensation, Shares		67,445
Repurchases of convertible notes	(500)		(500)
Ending Balance at Dec. 31, 2011	92,499	156	99,885		(7,542)
Ending Balance, Shares at Dec. 31, 2011		15,602,132
Net income (loss)	2,720				2,720
Employee stock purchase and option plans	822	2	820
Employee stock purchase and option plans, Shares		234,552
Repurchases of common stock	(5,524)	1	(5,525)
Repurchases of common stock, Shares		(37,151)
Stock-based compensation	3,469		3,469
Stock-based compensation, Shares		149,215
Common stock issued upon conversion of notes		11	(11)
Common stock issued upon conversion of notes ,Shares	1,061,745	1,061,745
Ending Balance at Dec. 31, 2012	$ 93,986	$ 170	$ 98,638		$ (4,822)
Ending Balance, Shares at Dec. 31, 2012		17,010,493