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Warrants (Details) - Warrants [Member] - $ / shares
1 Months Ended 12 Months Ended
Apr. 28, 2016
Dec. 31, 2017
Dec. 31, 2016
Warrants [Line Items]      
Market price per share (USD/share) $ 1.89 $ 1.73 $ 1.5
Exercise price (USD/share) $ 2.20 $ 2.20 $ 2.20
Risk free rate 1.84% 2.36% 2.40%
Dividend yield 0.00% 0.00% 0.00%
Expected term/Contractual life (years) 10 years 8 years 3 months 19 days 9 years 3 months 19 days
Expected volatility 224.19% 241.20% 232.20%