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Income taxes - Narrative (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
shares
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Income Tax Disclosure [Line Items]      
Effective income tax rate (1.80%) (0.50%)  
Statutory federal tax rate 21.00%    
Conversion of stock (in shares) | shares 3,057,000    
Stockholder's equity, exchange ratio 1    
Deferred tax assets, valuation allowance $ 116,600,000   $ 95,100,000
Liability on tax receivable agreement 0   $ 0
Unrecognized liability on tax receivable agreement 107,000,000    
Payments pursuant to tax receivable agreement 0 $ 2,822,000  
Tax Receivables Agreement | Related Party      
Income Tax Disclosure [Line Items]      
Payments pursuant to tax receivable agreement $ 0 $ 2,800,000