Net Loss per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2015

Summary of Computation of Basic and Diluted Net Loss Per Share

The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net loss attributable to common stockholders - basic and diluted	$	(20,379	)	$	(13,834	)	$	(62,052	)	$	(67,419	)
Weighted-average shares outstanding		29,354			24,195			28,825			17,138
Less: weighted average shares subject to repurchase		—			—			—			—
Weighted-average shares used to compute basic and diluted net loss per share		29,354			24,195			28,825			17,138
Basic and diluted net loss per common share	$	(0.69	)	$	(0.57	)	$	(2.15	)	$	(3.93	)

Summary of Potentially Anti-dilutive Securities Excluded from Computation of Diluted Shares Outstanding

The following potentially dilutive securities outstanding at the end of the periods presented have been excluded from the computation of diluted shares outstanding as the effect would be anti-dilutive:

	September 30,
	2015		2014
Options to purchase common stock		3,225,616		2,477,446
Restricted stock units		277,630		104,821