Net Loss per Share (Tables)

12 Months Ended

Dec. 31, 2014

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):

	December 31,
	2014			2013			2012
Net loss attributable to common stockholders - basic and diluted	$	(83,072	)	$	(18,497	)	$	(13,217	)
Weighted-average shares outstanding		18,921,533			450,061			130,718
Less: weighted average shares subject to repurchase		—			(61	)		(15,499	)
Weighted-average shares used to compute basic and diluted net loss per share		18,921,533			450,000			115,219
Basic and diluted net loss per common share	$	(4.39	)	$	(41.10	)	$	(114.71	)

Summary of Potentially Dilutive Securities Excluded from Computation of Diluted Shares Outstanding

The following potentially dilutive securities outstanding at the end of the years presented have been excluded from the computation of diluted shares outstanding:

	December 31,
	2014		2013		2012
Convertible preferred stock		—		10,491,140		5,991,757
Warrants to purchase convertible preferred stock (1)		—		173,912		173,912
Options to purchase common stock		2,723,366		1,403,655		462,471
Convertible notes		—		—		885,024
Restricted stock units		185,514		—		—

(1)	Assumes exercise of warrants to purchase convertible preferred stock at $5.17 per share.