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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]  
Securities Excluded from the Computation of Potentially Dilutive Securities

The following table details those securities that have been excluded from the computation of potentially dilutive securities:  

 

 

As of  March 31,

 

 

 

2018

 

 

2017

 

Outstanding options

 

 

5,693,250

 

 

 

5,693,250

 

Outstanding restricted stock units

 

 

874,164

 

 

 

1,060,381

 

Outstanding warrants

 

 

17,706,818

 

 

 

17,768,314

 

Total

 

 

24,274,232

 

 

 

24,521,945

 

 

 

Amounts in the table above reflect the common stock equivalents of the noted instruments.