Net Loss per Share

6 Months Ended

Jun. 30, 2011

Net Loss per Share

Net Loss per Share

2.  Net Loss per Share

Basic net loss per share (basic EPS) is computed by dividing net loss by the weighted average number of common shares outstanding during the period, less RSAs subject to forfeiture. Diluted net loss per share (diluted EPS) is computed by dividing net loss by the weighted average number of common shares outstanding during the period, less RSAs subject to forfeiture, plus dilutive potential common shares. Diluted EPS is identical to basic EPS for all periods presented since potential common shares are excluded from the calculation, as their effect is anti-dilutive.

Weighted Average Shares Outstanding

The following table sets forth the computation of basic and diluted net loss and the weighted average number of shares used in computing basic and diluted net loss per share:

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands, except for per share amounts)	2011			2010			2011			2010
Net loss	$	(25,045	)	$	(20,806	)	$	(47,712	)	$	(43,341	)
Weighted average shares of common stock outstanding	84,263			73,339			83,867			69,181
Less: unvested RSAs	(2,452		)	(57		)	(2,452		)	(57		)
Weighted average shares used in computing basic and diluted net loss per common share	81,811			73,282			81,415			69,124
Basic and diluted net loss per common share	$	(0.31	)	$	(0.28	)	$	(0.59	)	$	(0.63	)

Anti-dilutive securities

Securities that could potentially dilute basic EPS in the future that were not included in the computation of diluted EPS because their effect would have been anti-dilutive were as follows:

	Three Months Ended June 30,		Six Months Ended June 30,
(in thousands)	2011	2010	2011	2010
Shares issuable upon the exercise of stock options	4,500	6,191	4,663	6,016
Shares issuable under RSUs and RSAs	944	770	929	881
Shares issuable upon the conversion of convertible debt	6,668	6,668	6,668	6,668
Total anti-dilutive securities	12,112	13,629	12,260	13,565