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Warrant Liabilities (Tables)
6 Months Ended
Jun. 30, 2017
Warrant Liabilities [Abstract]  
Schedule of Weighted-average Assumptions
The following reflects the weighted-average assumptions for each of the six-month periods indicated:
  
Six Months Ended June 30,
 
  
2017
  
2016
 
       
Risk-free interest rate
  
1.13
%
  
0.20
%
Expected dividend yield
  
0
%
  
0
%
Expected lives
  
0.79
   
0.09
 
  Expected volatility
  
125.3
%
  
59.3
%
  Warrants classified as liabilities (in shares)
  
24,110,577
   
6,371,854