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Financial instruments and risk management (Details 6)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
BRL (R$)
IfrsStatementLineItems [Line Items]  
Notional R$ 160,000
Fair value instrument (52,149)
Object R$ 156
F X And Interest Rate Swap [Member]  
IfrsStatementLineItems [Line Items]  
Hedged object  USD debt 
Maturity 1st Qtr. 2024
Asset FX + 7,33% p.a. 
Liability 100% CDI + 2.20% p.a. 
Notional R$ 30,000
Fair value instrument (17,201)
Object R$ (80,378)
F X And Interest Rate Swap 1 [Member]  
IfrsStatementLineItems [Line Items]  
Hedged object USD debt 
Maturity 2nd Qtr. 2024
Asset FX + 6.32% p.a.
Liability 100% CDI + 1,61% p.a.
Notional R$ 130,000
Fair value instrument (34,948)
Object R$ 80,534