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Financial instruments - Changes in Fair Value of Liability for Contingent Consideration (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Trianni | Measurement Input, Discount Rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Discount rate 22  
TetraGenetics | Measurement Input, Discount Rate    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Discount rate 10.7  
Contingent Consideration | Level 3 | Trianni    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Liability at beginning of the period $ 23,505 $ 22,934
Increase (decrease) in fair value of liability for contingent consideration (2,602) 0
Liability at end of the period 20,903 22,934
Contingent Consideration | Level 3 | TetraGenetics    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Liability at beginning of the period 36,760 35,886
Increase (decrease) in fair value of liability for contingent consideration 946 (698)
Liability at end of the period $ 37,706 $ 35,188