Net Loss per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
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,

 

 

 

2016

 

 

2015

 

 

2014

 

Net loss attributable to common stockholders - basic

   and diluted

 

$

(95,817

)

 

$

(82,177

)

 

$

(83,072

)

Weighted-average shares used to compute basic and

   diluted net loss per share

 

 

30,784

 

 

 

28,964

 

 

 

18,922

 

Basic and diluted net loss per common share

 

$

(3.11

)

 

$

(2.84

)

 

$

(4.39

)

 
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,

 

 

 

2016

 

 

2015

 

 

2014

 

Options to purchase common stock

 

 

4,452,700

 

 

 

3,240,969

 

 

 

2,723,366

 

Restricted stock units

 

 

502,027

 

 

 

254,067

 

 

 

185,514