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Common Stock Warrants (Tables)
3 Months Ended
Mar. 31, 2017
Common Stock Warrant Activity

The following table summarizes the common stock warrant activity from December 31, 2016 through March 31, 2017:

 

     Shares      Weighted Average
Exercise Price
 

Outstanding, December 31, 2016

     13,488,296      $ 3.44  

Granted

     77,881        5.00  

Exercised

     —          —    

Forfeited/cancelled

     (1,317,161      5.63  
  

 

 

    

Outstanding, March 31, 2017

     12,249,016      $ 3.22