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Stock-Based Compensation - Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions (Details)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]    
Risk-free interest rate 0.79% 2.51%
Expected term 6 years 7 months 2 days 6 years
Expected volatility 122.24% 127.81%
Dividend yield 0.00% 0.00%