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Organization and significant accounting policies - Narrative (Details)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
reporting_unit
reportable_segment
supplier
Dec. 31, 2022
USD ($)
supplier
Sep. 20, 2022
USD ($)
Short-Term Debt [Line Items]      
Number of reportable segments | reportable_segment 1    
Number of reporting units | reporting_unit 1    
Cash, cash equivalents, and available-for-sale securities $ 48.1 $ 64.1  
Supplier Concentration Risk | Supply Purchase | One Supplier      
Short-Term Debt [Line Items]      
Concentration risk, percent 11.00%    
Supplier Concentration Risk | Accounts Payable      
Short-Term Debt [Line Items]      
Number of suppliers | supplier 0 0  
Supplier Concentration Risk | Accounts Payable | One Supplier      
Short-Term Debt [Line Items]      
Concentration risk, percent   23.00%  
The 2022 Term Loan 3      
Short-Term Debt [Line Items]      
Maximum borrowing capacity $ 10.0   $ 30.0