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Warrant Liabilities (Tables)
9 Months Ended
Sep. 30, 2018
Warrant Liabilities [Abstract]  
Schedule of Weighted-average Assumptions

The following reflects the weighted-average assumptions for each of the nine-month periods indicated:

 

    September 30, 2018     December 31, 2017  
Risk-free interest rate           1.31 %
Expected dividend yield           0 %
Expected lives           0.8  
Expected volatility           120.8 %
Warrants classified as liabilities (in shares)           2,834,246