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Income taxes - Additional information (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Jun. 13, 2024
Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]    
Applicable Tax Rate, Income Tax and Social Contribution Taxes, Base Rate 15.00%  
Applicable Tax Rate, Income Tax, Additional Tax on Taxable Income Above Threshold Amount 10.00%  
Applicable Tax Rate, Social Contribution Taxes, Additional Tax on Taxable Income Above Threshold Amount 9.00%  
Thres hold Amount Of Income For Additional Tax Rate R$ 240  
Corporate income tax reduction, percent   75.00%
Corporate income tax reduction, term   10 years