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Net revenue (Details 3) - Contract assets - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Balance at beginning of period R$ (675) R$ (805)
(Provision) (217)  
Reversal   218
Effect of movements in exchange rates (21) (88)
Balance at end of period R$ (913) R$ (675)