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Share-Based Compensation - Summary of Stock Options (Detail) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares, Beginning 41,713,506  
Number of shares, Granted 863,000  
Number of shares, Exercised (5,647,551)  
Number of shares, Forfeited (27,000)  
Number of shares, Ending 36,901,955 41,713,506
Number of shares, Vested and expect to vest 36,901,955  
Number of shares, Exercisable 13,445,369  
Weighted average exercise price per share, Beginning $ 0.25  
Weighted average exercise price per share, Granted 0.68  
Weighted average exercise price per share, Exercised 0.19  
Weighted average exercise price per share, Forfeited 0.21  
Weighted average exercise price per share, Ending 0.27 $ 0.25
Weighted average exercise price, Vested and expect to vest 0.27  
Weighted average exercise price per share, Exercisable $ 0.23  
Weighted remaining contractual years 7 years 10 months 24 days 8 years 9 months 10 days
Weighted remaining contractual years, Vested and expect to vest 7 years 10 months 24 days  
Weighted remaining contractual years, Exercisable 7 years 7 months 2 days  
Aggregate intrinsic value $ 237,704,168 $ 587,342,349
Aggregate intrinsic value, Vested and expect to vest 237,704,168  
Aggregate intrinsic value, Exercisable $ 87,093,196