NET LOSS PER COMMON SHARE

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

NET LOSS PER COMMON SHARE

NET LOSS PER COMMON SHARE

Basic net loss per common share is calculated using the weighted‑average number of common shares outstanding during the period less the weighted‑average shares subject to repurchase. Diluted net loss per common share gives effect to dilutive common stock subject to repurchase, stock options (calculated based on the treasury stock method), shares under the Company’s ESPP and convertible debt (calculated using an as-if-converted method). Potentially dilutive securities are excluded from shares used in computing diluted net loss per common share if their effect would be anti-dilutive.

The potential dilutive securities excluded from diluted earnings per common share were as follows (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2013	2012	2013	2012
Employee stock compensation plans	5,646	5,780	5,646	5,785
ESPP	14	—	14	—
Restricted stock subject to repurchase	3,887	2,026	3,887	2,057
Convertible notes	17,857	—	17,868	—
Total	27,404	7,806	27,415	7,842