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Employee Equity-Based Compensation - Black-Scholes Assumptions for Option Granted (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Expected term (in years) 5 years 9 months 14 days 5 years 11 months 8 days 6 years 3 months 10 days
Volatility 65.00% 58.00% 60.00%
Expected dividends $ 0 $ 0 $ 0
Risk free interest rates 1.10% 0.60% 2.10%
Estimated forfeitures 0.00% 0.00% 0.00%
Weighted average fair value (dollars per share) $ 4.09 $ 4.49 $ 8.33