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Significant Accounting Polices - Schedule of Estimate Fair Value of Stock Options Granted (Details)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Accounting Policies [Abstract]    
Risk-free interest rate, minimum 1.88% 2.35%
Risk-free interest rate, maximum 2.57% 2.98%
Expected life (years) 6 years 3 months 6 years 3 months
Volatility 60.00% 60.00%
Dividend rate 0.00% 0.00%