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Stock-Based Compensation - Schedule of Estimated Fair Value of Stock Options (Details) - shares
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]    
Number of options awarded to purchase common shares 28,000,000 10,000,000
Risk-free interest rate 1.19% 1.50%
Expected volatility 94.70% 100.30%
Assumed dividend yield
Expected life of options from the date of grant 9 years 9 months 18 days 9 years 9 months 18 days