Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Beginning balance at at Dec. 31, 2010	$ 64,378	$ 56	$ 315,257	$ (3,584)	$ (247,351)
Beginning balance, shares at at Dec. 31, 2010		55,953,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued in connection with acquisition, shares
Shares issued in connection with acquisition	1,007		1,007
Common stock issued (canceled) under stock plans, shares		1,746,000
Common stock issued (canceled) under stock plans	1,028	2	1,026
Share-based compensation	4,379		4,379
Foreign currency translation adjustment	(78)			(78)
Net income (loss)	(22,024)				(22,024)
Ending balance at at Dec. 31, 2011	48,702	58	321,681	(3,662)	(269,375)
Ending balance, shares at at Dec. 31, 2011		57,699,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (canceled) under stock plans, shares		(253,000)
Common stock issued (canceled) under stock plans	166	0	166
Common stock issued under bonus plans, shares			819,000
Common stock issued under bonus plans	1,005		1,005
Share-based compensation	3,723		3,723
Excess tax benefit	12		12
Foreign currency translation adjustment	129			129
Net income (loss)	(14,950)				(14,950)
Ending balance at at Dec. 31, 2012	38,775	58	326,575	(3,533)	(284,325)
Ending balance, shares at at Dec. 31, 2012	58,265,000	58,265,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (canceled) under stock plans, shares		873,000
Common stock issued (canceled) under stock plans	839	1	838
Share-based compensation	2,690		2,690
Foreign currency translation adjustment	279			279
Net income (loss)	5,064				5,064
Ending balance at at Dec. 31, 2013	$ 47,647	$ 59	$ 330,103	$ (3,254)	$ (279,261)
Ending balance, shares at at Dec. 31, 2013	59,138,000	59,138,000