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Deferred royalty obligation (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Jun. 30, 2022
Sep. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Aug. 25, 2021
Deferred Royalty Obligation [Abstract]              
Royalty Purchase Agreement             $ 325,000,000
Proceeds From Royalty Purchase Agreement, Gross     $ 225,000,000        
Royalty Purchase Additional Proceeds Eligibility   $ 75,000,000          
Royalty Purchase Agreement, Effective Interest Rate       10.00%      
Deferred Royalty Obligation $ 312,281,000     $ 312,281,000 $ 222,277,000 $ 225,477,000  
Less: royalty payments 7,611,000 10,998,000          
Plus: Additional proceeds from the sale of future royalties       75,000,000      
Less: Transaction costs       $ 1,898,000      
Plus: interest expense 19,662,000 23,200,000          
Less: cumulative catch-up adjustment, Financial income $ 4,851,000 $ 15,402,000