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Common Stock Warrants (Tables)
3 Months Ended
Mar. 31, 2016
Common Stock Warrant Activity

The following table summarizes the common stock warrant activity from December 31, 2015 through March 31, 2016:

 

     Shares      Weighted Average
Exercise Price
 

Outstanding, December 31, 2015

     8,908,586       $ 3.18   

Granted

     —           —     

Exercised

     —           —     

Forfeited/cancelled

     —           —     
  

 

 

    

Outstanding, March 31, 2016

     8,908,586       $ 3.18