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Product revenue and reserves - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Revenue from External Customer [Line Items]    
Product revenue, net $ 18,561 $ 2,296
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Six Individual Customers    
Revenue from External Customer [Line Items]    
Concentration risk, percentage 100.00%  
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | One Individual Customer    
Revenue from External Customer [Line Items]    
Concentration risk, percentage   100.00%