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Intangible assets - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Disclosure of detailed information about intangible assets [line items]    
Impairment of intangible assets $ 1,868 $ 0
In-Human Clinical Study | Milestone Payment    
Disclosure of detailed information about intangible assets [line items]    
Additions   500
In-Vivo Efficacy studies | Milestone Payment    
Disclosure of detailed information about intangible assets [line items]    
Additions   $ 195