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Stockholders' Equity - Schedule of Stock Options Activity (Details) - 2015 Equity Incentive Plan - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Number of Shares    
Outstanding at the beginning (in shares) 845  
Granted (in shares) 7,213  
Exercised (in shares) 0  
Forfeited (in shares) (159)  
Expired (in shares) (611)  
Outstanding at the end (in shares) 7,288 845
Expected to vest (in shares) 7,288  
Exercisable (in shares) 178  
Weighted Average Exercise Price    
Outstanding at the beginning (in dollars per share) $ 24.98  
Granted (in dollars per share) 2.18  
Exercised (in dollars per share) 3.00  
Forfeited (in dollars per share) 4.71  
Expired (in dollars per share) 23.98  
Outstanding at the end (in dollars per share) 2.94 $ 24.98
Expected to vest (in dollars per share) 2.94  
Exercisable (in dollars per share) $ 31.54  
Weighted Average Remaining Term    
Weighted Average Remaining Term (in years) 9 years 5 months 26 days 1 year 8 months 15 days
Vested and expected to vest (in years) 9 years 5 months 26 days  
Exercisable (in years) 4 years 5 months 19 days  
Aggregate Intrinsic Value    
Outstanding $ 3,438 $ 0
Expected to vest 3,438  
Exercisable $ 1