Net Loss per Share (Tables)

12 Months Ended

Dec. 31, 2012

Net Loss per Share

Computation of basic and diluted net income (loss) and the weighted-average number of shares used in computing basic and diluted net income (loss) per share

	Year Ended December 31,
(in thousands, except for per share data)	2012			2011			2010
Basic and diluted:
Net loss	$	(18,542	)	$	(115,344	)	$	(83,862	)
Weighted-average shares of common stock outstanding		93,410			84,493			72,103
Less: unvested RSAs		(2,501	)		(2,442	)		(33	)
Weighted-average shares used in computing basic and diluted net loss per common share		90,909			82,051			72,070
Basic and diluted net loss per share	$	(0.20	)	$	(1.41	)	$	(1.16	)

Schedule of anti-dilutive securities

	Year Ended December 31,
(in thousands)	2012		2011		2010
Shares issuable under Equity Incentive Plans and ESPP		5,367		5,464		6,636
Shares issuable upon the conversion of convertible subordinated notes		6,668		6,668		6,668
Total anti-dilutive securities		12,035		12,132		13,304