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Warrant Liabilities (Tables)
6 Months Ended
Jun. 30, 2014
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,
 
 
 
2014
  
2013
 
        
Risk-free interest rate
  0.44%  0.63%
Expected dividend yield
  0%  0%
Expected lives
  1.96   2.96 
  Expected volatility
  84.1%  67.3%
  Warrants classified as liabilities (in shares)
  6,984,716   6,984,716 
Gain on warrant liabilities
 $12,234,301  $838,487