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Summary of Significant Accounting Policies (Details) - shares
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Accounting Policies [Abstract]    
Options to purchase common stock 15,371,765 17,248,942
Warrants to purchase common stock 34,626,339 7,793,847
Totals 49,998,104 25,042,789