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Significant Accounting Polices - Schedule of Estimate Fair Value of Stock Options Granted (Details)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Accounting Policies [Abstract]    
Risk-free interest rate, minimum 0.37% 0.36%
Risk-free interest rate, maximum 0.84% 1.61%
Expected life (years) 6 years 3 months 6 years 3 months
Expected volatility 92.40% 60.00%
Dividend rate 0.00% 0.00%