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Warrant Liabilities (Tables)
9 Months Ended
Sep. 30, 2015
Warrant Liabilities [Abstract]  
Schedule of weighted-average assumptions
The following reflects the weighted-average assumptions for each of the nine-month periods indicated:
 
   
Nine Months Ended
September 30,
 
 
 
2015
  
2014
 
        
Risk-free interest rate
  0.21%  0.54%
Expected dividend yield
  0%  0%
Expected lives
  0.84   1.71 
  Expected volatility
  69.1%  81.9%
  Warrants classified as liabilities (in shares)
  6,371,854   6,984,716