Quarterly report pursuant to Section 13 or 15(d)

EQUITY-BASED COMPENSATION - Stock Options, Valuation Assumptions (Details)

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EQUITY-BASED COMPENSATION - Stock Options, Valuation Assumptions (Details) - Stock Options
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected annual dividend yield 0.00% 0.00%
Expected volatility 47.50% 0.00%
Risk-free rate of return 0.70% 0.00%
Expected option term (years) 4 years 6 months 0 years