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Common Stock Warrants (Tables)
9 Months Ended
Sep. 30, 2018
Common Stock Warrant Activity

The following table summarizes the common stock warrant activity from December 31, 2017 through September 30, 2018:

 

     Shares      Weighted Average
Exercise Price
 

Outstanding, December 31, 2017

     13,229,778      $ 3.35  

Granted

     290        5.15  

Exercised

     (2,533,042      2.50  

Forfeited/cancelled

     —          —    
  

 

 

    

Outstanding, September 30, 2018

     10,697,026      $ 3.54