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Trade receivables (Details 2) - Trade receivables - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Movement of impairment loss on trade receivables      
Balance at beginning of period R$ (692) R$ (246) R$ (352)
Provision (3,106) (1,751) (430)
Reversal 2,826 1,337 378
Partial investment spin-off     160
Exchange variation (87) (32) (2)
Balance at end of period R$ (1,059) R$ (692) R$ (246)