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Liability related to sales of future royalties and sales milestones, net - Narrative (Details)
$ in Millions
1 Months Ended
Dec. 31, 2022
USD ($)
payment
Nov. 30, 2021
USD ($)
Sep. 30, 2023
USD ($)
Class of Warrant or Right [Line Items]      
Number of development payments | payment 2    
Contract with customer, liability     $ 140.8
Blackstone | Blackstone Collaboration Agreement      
Class of Warrant or Right [Line Items]      
Contract with customer, liability gross   $ 50.0  
Contract with customer, liability $ 35.0    
Remaining performance obligation, variable consideration amount $ 30.0    
Strategic Collaboration and Financing Agreement      
Class of Warrant or Right [Line Items]      
Interest rate (in percent) 15.80%   15.80%