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Liability Related to the Sale of Future Royalties - Schedule of Liability Related to the Sale of Future Royalties (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2023
USD ($)
Nonmonetary Transaction [Roll Forward]  
Carrying value of liability related to the sale of future royalties at January 1, 2023 $ 49,483
Other (127)
Imputed interest expense 1,968
Less: payments to the Purchasers (6,479)
Carrying value of liability related to the sale of future royalties at September 30, 2023 $ 44,845