Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Loss per Share

The following table presents the calculation of basic and diluted net loss per share for the periods presented (in thousands, except per share data):

	Three Months Ended March 31,
	2016			2015
Net loss	$	(27,171	)	$	(19,168	)
Basic shares:
Weighted-average shares used to compute basic net loss per share		90,519			76,338
Diluted shares:
Weighted-average shares used to compute diluted net loss per share		90,519			76,338
Net loss per share:
Basic and diluted	$	(0.30	)	$	(0.25	)

Schedule of Anti-Dilutive Securities Excluded from the Diluted per Share Calculation

The anti-dilutive securities excluded from the shares used to calculate the diluted net loss per share are as follows (in thousands):

	As of March 31,
	2016		2015
Shares subject to outstanding common stock options and employee stock    purchase plan		10,500		12,637
Restricted stock units		6,967		4,319
		17,467		16,956