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Equity-Based Compensation - Assumptions (Details) - Stock options
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Assumptions used in determining the fair value of options  
Risk-free interest rate 0.95%
Expected dividend yield 0.00%
Expected term (years to liquidity) 6 years 2 months 15 days
Expected volatility 81.65%
Unrecognized equity-based compensation expense $ 23.6
Period for recognition 2 years 9 months 18 days