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Royalty Financing Obligation - Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Aug. 01, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Debt Instrument, Increase (Decrease), Net [Roll Forward]            
Receipt of the first tranche of the royalty financing obligation       $ 30,000 $ 0  
Accretion of imputed interest expense on royalty financing obligation   $ 1,978 $ 3,564 7,532 $ 9,087  
Less: royalty payable to RTW classified within accrued expenses   21,187   21,187   $ 37,668
Royalty Financing            
Debt Instrument, Increase (Decrease), Net [Roll Forward]            
Royalty financing obligation – beginning balance       0    
Receipt of the first tranche of the royalty financing obligation $ 30,000     30,000    
Accretion of imputed interest expense on royalty financing obligation       1,404    
Royalty financing obligation – ending balance   31,404   31,404    
Less: royalty payable to RTW classified within accrued expenses   253   253    
Royalty financing obligation, non-current   $ 31,151   $ 31,151