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Deferred income taxes (Details Narrative) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Notes and other explanatory information [abstract]    
Tax losses carryforward R$ 6,632,460 R$ 7,131,786
Income tax asset R$ 3,394,679 R$ 3,768,459