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Net Loss per Share Attributable to Common Stockholders
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Net Loss per Share Attributable to Common Stockholders
Net Loss per Share Attributable to Common Stockholders
The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders for the three months ended March 31, 2017 and 2016 (in thousands, except for share and per share amounts):
 
Three Months Ended
March 31,
 
2017
 
2016
Net loss attributable to common stockholders, basic and diluted
$
(27,156
)
 
$
(19,888
)
Net loss per share attributable to common stockholders, basic and diluted
$
(0.94
)
 
$
(0.71
)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted
28,808,195

 
28,005,611


 
The following common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented as their inclusion would have been antidilutive: 
 
As of March 31,
 
2017
 
2016
Outstanding common stock options
3,294,040

 
2,900,675

Outstanding common stock warrants
61,595

 
61,595

Unvested restricted stock awards
555,723

 
426,117

Shares expected to be purchased on June 30 under the 2014 ESPP
15,159

 
9,034