Shareholder's Equity - Schedule of Assumption of Black-Scholes Option Pricing Model (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2017
Expected volatility	84.50%		75.00%
Dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	2.40%	2.50%	2.10%
Expected volatility		80.70%
Expected term (in years)	3 years 6 months	5 years	5 years 6 months
Maximum [Member]
Risk-free interest rate	2.60%	3.20%	3.50%
Expected volatility		84.50%
Expected term (in years)	5 years 9 months 18 days	9 years 1 month 6 days	6 years