v3.26.3
Stock-based Compensation - Summary of Stock Options Activity (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]    
Number of Options Outstanding, Beginning Balance | shares 13,025,261  
Number of Options, Granted | shares 14,683,439  
Number of Options, Exercised | shares (623,475)  
Number of Options, Forfeited | shares (1,031,577)  
Number of Options, Expired | shares (8,602)  
Number of Options Outstanding, Ending Balance | shares 26,045,046 13,025,261
Number of Options, Exercisable | shares 10,059,763  
Number of Options, Vested and Expected to Vest | shares 26,045,046  
Weighted average exercise price, Beginning Balance | $ / shares $ 2.74  
Weighted average exercise price, Granted | $ / shares 9.19  
Weighted average exercise price, Exercised | $ / shares 2.3  
Weighted average exercise price, Forfeited | $ / shares 3.54  
Weighted average exercise price, Expired | $ / shares 2.35  
Weighted average exercise price, Ending Balance | $ / shares 6.36 $ 2.74
Weighted average exercise price, Exercisable | $ / shares 3.83  
Weighted average exercise price, Vested and Expected to Vest | $ / shares $ 6.36  
Weighted average remaining contractual term, Balance 8 years 10 months 24 days 8 years 11 months 23 days
Weighted average remaining contractual term, Exercisable 8 years 2 months 12 days  
Weighted average remaining contractual term, Vested and expected to vest 8 years 10 months 24 days  
Aggregate Intrinsic value, Balance | $ $ 222,801 $ 39,810
Aggregate Intrinsic value, Exercisable | $ 100,395  
Aggregate Intrinsic value, Vested and expected to vest | $ $ 222,801