Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Common Stock	Capital in Excess of Par Value	Accumulated Other Comprehensive Income/(Loss)	Accumulated Deficit	Total
Beginning Balance at Dec. 31, 2008	$ 9	$ 1,312,796	$ 1,439	$ (1,124,090)	$ 190,154
Beginning Balance, Shares at Dec. 31, 2008	92,503
Stock option exercises and RSU release		4,696			4,696
Stock option exercises and RSU release, Shares	742
Stock-based compensation		10,326			10,326
Shares issued for Employee Stock Purchase Plan		124			124
Shares issued for Employee Stock Purchase Plan, Shares	36
Other comprehensive loss			(414)		(414)
Net loss				(102,519)	(102,519)
Comprehensive loss					(102,933)
Ending Balance at Dec. 31, 2009	9	1,327,942	1,025	(1,226,609)	102,367
Ending Balance, Shares at Dec. 31, 2009	93,281
Stock option exercises and RSU release		8,340			8,340
Stock option exercises and RSU release, Shares	1,176
Stock-based compensation		17,399			17,399
Shares issued for Employee Stock Purchase Plan		551			551
Shares issued for Employee Stock Purchase Plan, Shares	60
Other comprehensive loss			(57)		(57)
Net loss				(37,938)	(37,938)
Comprehensive loss					(37,995)
Ending Balance at Dec. 31, 2010	9	1,354,232	968	(1,264,547)	90,662
Ending Balance, Shares at Dec. 31, 2010	94,517				94,517
Sale of common stock, net of issuance costs of $617	2	219,781			219,783
Sale of common stock, net of issuance costs of $617, shares	19,000
Stock option exercises and RSU release		3,916			3,916
Stock option exercises and RSU release, Shares	866
Stock-based compensation		18,885			18,885
Shares issued for Employee Stock Purchase Plan		614			614
Shares issued for Employee Stock Purchase Plan, Shares	102
Other comprehensive loss			(2,071)		(2,071)
Net loss				(133,978)	(133,978)
Comprehensive loss					(136,049)
Ending Balance at Dec. 31, 2011	$ 11	$ 1,597,428	$ (1,103)	$ (1,398,525)	$ 197,811
Ending Balance, Shares at Dec. 31, 2011	114,485				114,485