v3.26.3
Stock-Based Compensation Expense - Summary of Options Outstanding (Detail) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding as of January 1, 2026 5,370,220  
Granted 7,778,380  
Exercised (440,281)  
Forfeited (674,711)  
Expired (156,948)  
Outstanding as of September 30, 2026 11,876,660 5,370,220
Exercisable as of September 30, 2026 4,767,991  
Weighted Average Exercise Price per Share    
Outstanding as of January 1, 2026 $ 1.66  
Granted 2.44  
Exercised 1.72  
Forfeited 2.44  
Expired 3.65  
Outstanding as of September 30, 2026 2.1 $ 1.66
Exercisable as of September 30, 2026 $ 1.59  
Weighted Average Remaining Contractual Term (Years)    
Outstanding 6 years 4 months 2 days 2 years 4 months 9 days
Exercisable as of September 30, 2026 1 year 9 months  
Aggregate Intrinsic Value    
Aggregate Intrinsic Value, Outstanding $ 21,406 $ 21,522
Exercisable as of September 30, 2026 $ 11,027