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Stock-Based Compensation - Summary of Stock Option Activity (Detail)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Share-Based Payment Arrangement [Abstract]    
Beginning Balance, Number of Shares | shares 8,034,755  
Number of Shares, Granted | shares 1,446,701  
Number of Shares, Exercised | shares (1,110,247)  
Number of Shares, Cancelled or forfeited | shares (150,914)  
Ending Balance, Number of Shares | shares 8,220,295 8,034,755
Number of Shares, Exercisable | shares 4,250,968  
Beginning Balance, Weighted Average Exercise Price | $ / shares $ 17.66  
Weighted Average Exercise Price, Granted | $ / shares 75.41  
Weighted Average Exercise Price, Exercised | $ / shares 18.38  
Weighted Average Exercise Price, Cancelled or forfeited | $ / shares 47.78  
Ending Balance, Weighted Average Exercise Price | $ / shares 27.17 $ 17.66
Weighted Average Exercise Price, Exercisable | $ / shares $ 14.07  
Weighted Average Contractual Term 7 years 7 months 13 days 8 years 21 days
Weighted Average Contractual Term, Exercisable 6 years 10 months 24 days  
Aggregate Intrinsic Value, Outstanding Balance | $ $ 617,588 $ 449,403
Aggregate Intrinsic Value, Exercisable | $ $ 375,044