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Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Shares      
Shares, Outstanding, Beginning Balance (in shares) 12,223,637    
Shares, Granted (in shares) 1,950,032    
Shares, Exercised (in shares) (331,916)    
Shares, Forfeited or expired (in shares) (141,409)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (259,817)    
Shares, Outstanding, Ending Balance (in shares) 13,440,527   12,223,637
Shares, Exercisable (in shares) 8,970,940    
Shares, Vested and expected to vest (in shares) 12,435,275    
Weighted- Average Exercise Price      
Weighted- Average Exercise Price, Outstanding, Beginning Balance (in dollars per share) $ 15.11    
Weighted- Average Exercise Price, Granted (in dollars per share) 16.18    
Weighted- Average Exercise Price, Exercised (in dollars per share) 9.41    
Weighted- Average Exercise Price, Forfeited (in dollars per share) 11.64    
Weighted- Average Exercise Price, Expired (in dollars per share) 22.09    
Weighted- Average Exercise Price, Outstanding, Ending Balance (in dollars per share) 15.30   $ 15.11
Weighted- Average Exercise Price, Exercisable (in dollars per share) 17.66    
Weighted- Average Exercise Price, Vested and expected to vest (in dollars per share) $ 15.70    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Weighted- Average Remaining Contractual Term, Outstanding (in years) 6 years 4 months 24 days   6 years 8 months 12 days
Weighted- Average Remaining Contractual Term, Exercisable (in years) 5 years 4 months 24 days    
Weighted- Average Remaining Contractual Term, Vested and expected to vest (in years) 6 years 3 months 18 days    
Aggregate Intrinsic Value, Outstanding, Ending Balance $ 18    
Aggregate Intrinsic Value, Exercisable 10    
Aggregate Intrinsic Value, Vested and expected to vest $ 16    
Weighted-average grant-date fair value of options granted (in dollars per share) $ 12.79 $ 3.78  
Intrinsic value of options exercised $ 2,616 $ 61  
Fair value of shares vested 13,533 $ 13,611  
Unrecognized compensation expense related to non-vested stock-options, net of related forfeiture estimates $ 26,300    
Unrecognized compensation expense recognition period (in years) 1 year 4 months 24 days    
Stock Option Additional Information [Table] The following table summarizes additional information on stock options (in thousands, except per share amounts):
Nine Months Ended September 30,
20242023
Weighted-average fair value per share of stock options granted
$12.79 $3.78 
Total intrinsic value of stock options exercised
$2,616 $61 
Total cash received for stock options exercised
$3,122 $87 
Total grant date fair value of stock options vested
$13,533 $13,611