Net Loss per Share

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Net Loss per Share

Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted average number of common shares outstanding during the period, less shares subject to repurchase, and excludes any dilutive effects of employee share based awards and warrants. Diluted net income per common share is computed giving effect to all potentially dilutive common shares, including common stock issuable upon exercise of stock options, conversion of the Convertible Senior Notes and unvested restricted common stock and stock units. As we had net losses for the years ended December 31, 2016, 2015 and 2014, all potential common shares were determined to be anti-dilutive.

The following table sets forth the computation of net loss per common share (in thousands, except per share amounts):

	Year Ended December 31,
	2016			2015			2014
Numerator:
Net loss	$	(480,129	)	$	(539,215	)	$	(443,790	)
Denominator:
Weighted average number of shares outstanding—basic and diluted	163,211			154,120			142,176
Net loss per share—basic and diluted	$	(2.94	)	$	(3.50	)	$	(3.12	)

The following outstanding options, unvested shares and units, ESPP shares, shares issuable upon the conversion of our Convertible Senior Notes and shares contingently issuable were excluded (as common stock equivalents) from the computation of diluted net loss per common share for the periods presented as their effect would have been anti-dilutive (in thousands):

	As of December 31,
	2016	2015	2014
Options to purchase common stock	8,085	11,494	18,578
Unvested early exercised common shares	—	936	2,382
Unvested restricted stock awards and units	19,883	20,054	8,341
Convertible senior notes	15,141	15,141	—
iSIGHT earn-out contingently issuable shares	1,793	—	—
ESPP shares	314	210	124

In February 2017, we released 1,793,297 shares of common stock issued to former stockholders of iSIGHT as the threat intelligence bookings target associated with the release of these shares was determined to have been achieved. If all the necessary conditions for release were satisfied prior to December 31, 2016, the release would have increased the number of weighted average shares outstanding used to compute basic net loss per share for the year ended December 31, 2016.