Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income ( loss )	Retained (Deficit)
Beginning balance at Dec. 31, 2009	$ 55,116	$ 297	$ 213,531	$ (125,568)	$ 6	$ (33,150)
Beginning balance, Shares at Dec. 31, 2009		29,736		(17,604)
Issuance of common stock related to employee stock plans	441		(1,007)	1,448
Issuance of common stock related to employee stock plans, Shares				181
Issuance of restricted stock awards			(232)	232
Issuance of restricted stock awards, Shares				29
Share-based compensation expense	1,034		1,034
Currency translation adjustment	(54)				(54)
Net income (loss)	(23,572)					(23,572)
Ending balance at Dec. 31, 2010	32,965	297	213,326	(123,888)	(48)	(56,722)
Ending balance, Shares at Dec. 31, 2010		29,736		(17,394)
Issuance of common stock related to employee stock plans	483		(1,365)	1,848
Issuance of common stock related to employee stock plans, Shares				231
Repurchases of common stock	(3,229)			(3,229)
Repurchases of common stock, Shares				(1,247)
Forfeiture of restricted stock awards			120	(120)
Forfeiture of restricted stock awards, Shares				(15)
Share-based compensation expense	1,201		1,201
Currency translation adjustment	(51)				(51)
Net income (loss)	344					344
Ending balance at Dec. 31, 2011	31,713	297	213,282	(125,389)	(99)	(56,378)
Ending balance, Shares at Dec. 31, 2011		29,736		(18,425)
Issuance of common stock related to employee stock plans	763		(1,463)	2,226
Issuance of common stock related to employee stock plans, Shares				280
Repurchases of common stock	(2,643)			(2,643)
Repurchases of common stock, Shares				(694)
Share-based compensation expense	1,419		1,419
Currency translation adjustment	(24)				(24)
Net income (loss)	1,447					1,447
Ending balance at Dec. 31, 2012	$ 32,675	$ 297	$ 213,238	$ (125,806)	$ (123)	$ (54,931)
Ending balance, Shares at Dec. 31, 2012		29,736		(18,839)