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Strategic Investment - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 04, 2023
Sep. 30, 2024
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Strategic Investment [Line Items]          
Common stock, par value   $ 0.0001 $ 0.0001   $ 0.0001
Aggregate gross proceeds       $ 928  
Non-refundable upfront payment $ 35,600        
Revenue recognized     $ (125,863)   $ (64,703)
Astellas          
Strategic Investment [Line Items]          
Revenue recognized   $ 11,900 23,700    
Deferred revenue recognized   $ 11,900 11,900    
Securities Purchase Agreement | Astellas | Common Stock          
Strategic Investment [Line Items]          
Discount for lack of marketability of shares, at fair value on date of issuance $ 14,400        
Securities Purchase Agreement | Astellas | Private Placement | Common Stock          
Strategic Investment [Line Items]          
Sale of stock, number of shares issued 8,333,333        
Common stock, par value $ 0.0001        
Sale of stock, price per share $ 3        
Aggregate gross proceeds $ 25,000        
Astellas Strategic Rights Letter Agreement          
Strategic Investment [Line Items]          
Revenue recognized     $ (23,722)    
Astellas Strategic Rights Letter Agreement | Astellas          
Strategic Investment [Line Items]          
Proceeds from rights granted $ 25,000        
Maximum number of shares owned at time of termination 8,000,000        
Discount for lack of marketability of shares, at fair value on date of issuance $ 14,400        
Proceeds from shares allocated to non-refundable upfront payment $ 10,600