Net Loss Per Share (Tables)
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders

Basic and diluted net loss per share attributable to common stockholders was calculated as follows for the years ended December 31, 2015, 2014 and 2013:

 

     Year Ended December 31,  
     2015     2014     2013  

Numerator:

      

Net loss

   $ (39,748 )    $ (28,648 )    $ (13,317 ) 

Accretion of redeemable convertible preferred stock to redemption value

     —          (11 )      (27 ) 
  

 

 

   

 

 

   

 

 

 

Net loss attributable to common stockholders

   $ (39,748 )    $ (28,659 )    $ (13,344 ) 
  

 

 

   

 

 

   

 

 

 

Denominator:

      

Weighted average common shares outstanding, basic and diluted

     23,244,162        10,652,865        2,609,020   
  

 

 

   

 

 

   

 

 

 

Net loss per share attributable to common stockholders, basic and diluted

   $ (1.71 )    $ (2.69 )    $ (5.11 ) 
  

 

 

   

 

 

   

 

 

 
Schedule of Antidilutive Securities, Excluded from Computation of Diluted Net Loss per Share

The Company excluded the following common stock equivalents, outstanding as of December 31, 2015, 2014 and 2013, from the computation of diluted net loss per share attributable to common stockholders for the years ended December 31, 2015, 2014 and 2013 because they had an anti-dilutive impact due to the net loss attributable to common stockholders incurred for the periods.

 

     December 31,  
     2015      2014      2013  

Options to purchase common stock

     2,115,519         1,611,991         924,132   

Non-vested restricted common stock

     —          28,437         —    

Warrants for the purchase of redeemable convertible preferred stock

     —          —          51,830   

Warrants for the purchase of common stock

     18,939         89,708         —    

Redeemable convertible preferred stock (as converted to common stock)

     —          —          12,440,205   
  

 

 

    

 

 

    

 

 

 
     2,134,458         1,730,136         13,416,167