Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2017

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,
	2017			2016
Net loss	$	(26,994	)	$	(27,171	)
Weighted-average shares used to compute basic and diluted net loss per share	97,475			90,519
Net loss per share, basic and diluted	$	(0.28	)	$	(0.30	)

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

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

	As of March 31,
	2017	2016
Shares subject to outstanding common stock options and employee stock    purchase plan	7,647	10,500
Restricted stock units	6,517	6,967
	14,164	17,467