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Summary of significant accounting policies (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
segment
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Property, plant, and equipment      
Accumulated deficit $ (108,069) $ (76,162)  
Cash, cash equivalents and investments $ 132,900    
Number of reportable segment | segment 1    
Top of range      
Property, plant, and equipment      
Expenses associated with defined contribution plans $ 100 $ 100 $ 100
Building improvements      
Property, plant, and equipment      
Estimated useful lives 10 years    
Laboratory equipment      
Property, plant, and equipment      
Estimated useful lives 5 years    
Office equipment      
Property, plant, and equipment      
Estimated useful lives 5 years    
Information and communication equipment (ICT)      
Property, plant, and equipment      
Estimated useful lives 5 years