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Stock-Based Compensation - Schedule of Profit Unit Interest (Detail) - Profit Unit Interest
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Units  
Outstanding beginning balance (in shares) | shares 12,202,135
Granted (in shares) | shares 0
Forfeited (in shares) | shares (54,800)
Outstanding ending balance (in shares) | shares 12,147,335
Avg Fair Value at Grant Date  
Outstanding beginning balance (in dollars per share) | $ / shares $ 0.08
Granted (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 0.08
Outstanding ending balance (in dollars per share) | $ / shares $ 0.08