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Stock-Based Compensation - Schedule of Stock Option Activity (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Number of shares    
Outstanding as at beginning of period (in shares) | shares 8,670,742  
Granted (in shares) | shares 3,297,550  
Exercised (in shares) | shares (389,043)  
Forfeited (in shares) | shares (205,201)  
Outstanding as at end of period (in shares) | shares 11,374,048 8,670,742
Options vested and exercisable as at end of period (in shares) | shares 6,033,473  
Options expected to vest as at end of period (in shares) | shares 5,340,575  
Weighted Average Exercise Price    
Outstanding as at beginning of period (in dollars per share) | $ / shares $ 8.52  
Granted (in dollars per share) | $ / shares 14.35  
Exercised (in dollars per share) | $ / shares 3.64  
Forfeited (in dollars per share) | $ / shares 15.83  
Outstanding at end of period (in dollars per share) | $ / shares 10.06 $ 8.52
Options vested and exercisable as at end of period (in dollars per share) | $ / shares 9.04  
Options expected to vest as at end of period (in dollars per share) | $ / shares $ 11.22  
Weighted Average Remaining Contractual Life    
Weighted average remaining contractual life of outstanding options (in years) 7 years 3 months 18 days 7 years 7 months 6 days
Weighted Average Remaining Contractual Life of vested and exercisable options (in years) 6 years 14 days  
Weighted Average Remaining Contractual Life of expected to vest options (in years) 8 years 8 months 15 days  
Intrinsic value of outstanding options | $ $ 44,235 $ 61,749
Intrinsic Value of vested and exercisable options | $ 31,002  
Intrinsic Value of expected to vest options | $ $ 13,233