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Stock-Based Compensation - Schedule of Valuation Assumptions, Profit Unit Interests (Detail) - Profit Unit Interest
12 Months Ended
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term 3 years
Volatility 68.00%
Discount for lack of marketability 45.00%
Risk free rate 0.20%