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Net Loss Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following shares were excluded from the calculation of diluted net loss per share applicable to common stockholders, prior to the application of the treasury stock method, because their effect would have been anti-dilutive for the periods presented:

 

 

 

Three Months Ended

March 31,

 

 

 

2018

 

 

2017

 

Options to purchase common shares

 

 

4,542,082

 

 

 

4,152,265

 

Restricted stock units

 

 

1,714,463

 

 

 

520,120

 

Warrants to purchase common stock

 

 

528,958

 

 

 

528,958

 

Total

 

 

6,785,503

 

 

 

5,201,343