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Financial assets and financial liabilities (Details 9) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents R$ (540,052) R$ 344,520 R$ (296,480)
Exposure [member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents 23,173    
Increase in Foreign Currency Sensitivity +10% [member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents 2,317    
Decrease in Foreign Currency Sensitivity -10% [member] | Currency risk [member]      
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents R$ (2,317)