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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2021
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jan. 01, 2025
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Shares reserved for issuances   73,863,844 82,654,698    
Weighted-average remaining contractual term outstanding   5 years 5 months 1 day      
Stock subject to repurchase related to stock options early exercised and unvested   211,184 403,764    
Stock repurchase program, remaining authorized repurchase amount   $ 0.4 $ 0.8    
Time Based Restricted Stock Units Rsu [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
PSUs ,Granted   1,064,518 566,389 81,134  
Performance Based Restricted Stock Units [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
PSUs ,Granted   565,498      
Dividend yield   0.00% 0.00% 0.00%  
Target percentage of number of shares earned   100.00%      
Performance Based Restricted Stock Units [Member] | Maximum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Percentage of number of shares earned   300.00%      
Share based compensation by share based award vesting term   4 years      
Performance Based Restricted Stock Units [Member] | Minimum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Percentage of number of shares earned   0.00%      
Share based compensation by share based award vesting term   2 years      
Stock Options [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Dividend yield   0.00% 0.00% 0.00%  
2015 Equity Incentive Plan [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Weighted-average remaining contractual term outstanding   10 years      
2015 Equity Incentive Plan [Member] | Maximum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Share based compensation by share based award vesting term   5 years      
2015 Equity Incentive Plan [Member] | Minimum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Share based compensation by share based award vesting term   4 years      
2021 Equity Incentive Plan [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Weighted-average remaining contractual term outstanding   10 years      
Number of Shares Available for Grant   22,532,379      
Share based compensation arrangement by share based payment award cumulative annual increase percentage   5.00%      
2021 Equity Incentive Plan [Member] | Subsequent Event [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Shares reserved for issuances         14,532,010
2021 Equity Incentive Plan [Member] | Maximum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Share based compensation by share based award vesting term   4 years      
2021 Equity Incentive Plan [Member] | Minimum [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Share based compensation by share based award vesting term   1 year      
Employee Stock Purchase Plan [Member]          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Shares reserved for issuances 5,354,000        
Number of shares issued under share based compensation   0      
Share Based Compensation Arrangement, Cumulative Annual Increase,Shares 10,708,000        
Share Based Compensation Arrangement, Cumulative Annual Increase Percentage Of fully Diluted Shares Of Common stock outstanding 1.00%        
Percentage of discount to the lower of closing price on that day or the closing price on the first day of the offering period 15.00%