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Income taxes - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Income Tax Disclosure [Line Items]          
Effective income tax rate (0.50%) 2.50% (0.60%) (2.80%)  
Statutory federal tax rate     21.00%    
Conversion of stock (in shares) | shares 0   776,000    
Stockholder's equity, exchange ratio 1   1    
Deferred tax assets, valuation allowance $ 87,300,000   $ 87,300,000   $ 91,800,000
Liability on tax receivable agreement     0    
Unrecognized liability on tax receivable agreement     88,000,000    
Payments pursuant to tax receivable agreement     2,822,000 $ 216,000  
Tax Receivables Agreement          
Income Tax Disclosure [Line Items]          
Liabilities under tax receivables agreement, net of current portion 0   0   $ 2,800,000
Tax Receivables Agreement | Related Party          
Income Tax Disclosure [Line Items]          
Payments pursuant to tax receivable agreement $ 0 $ 0 $ 2,800,000 $ 200,000