Net Loss per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Computation of Net Loss per Common Share

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

	Year Ended December 31,
	2014			2013			2012
Numerator:
Net loss	$	(443,790	)	$	(120,635	)	$	(35,756	)
Denominator:
Weighted average number of shares outstanding — basic and diluted	142,176			45,271			10,917
Net loss per share — basic and diluted	$	(3.12	)	$	(2.66	)	$	(3.28	)

Summary of Outstanding Options, Unvested Shares and Units, ESPP Shares, Warrants, and Convertible Preferred Stock Excluded from Computation of Diluted Net Loss Per Common Share as Effect would be Anti-Dilutive

The following outstanding options, unvested shares and units, ESPP shares, warrants, and convertible preferred stock 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,
	2014	2013	2012
Options to purchase common stock	18,578	27,422	17,336
Unvested early exercised common shares	2,382	4,877	7,832
Unvested restricted stock awards and units	8,341	3,602	—
Convertible preferred stock	—	—	73,747
Warrants to purchase convertible preferred stock	—	—	616
Warrants to purchase common stock	—	312	—
ESPP shares	124	249	—