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Warrants for Stock - Fair Value Assumptions for Warrants (Details) - Warrants
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Expected life 5 years 5 years
Dividend yield 0.00% 0.00%
Minimum    
Risk free interest rates 1.19% 1.25%
Estimated volatility 918.70% 422.90%
Maximum    
Risk free interest rates 2.13% 1.72%
Estimated volatility 972.10% 667.50%