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Earnings (loss) per share (Details) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Notes and other explanatory information [abstract]      
Net loss for the period attributable to controlling shareholders, Continued operations R$ (2,028,559) R$ (3,115,455)  
Weighted average number of outstanding shares - basic, Continued operations 1,360,268,402 1,052,606,000  
Net loss per share basic, Continued operations R$ (1.49) R$ (2.96) R$ 0.62
Weighted average number of outstanding shares - diluted, Continued operations 1,360,268,402 1,052,606,000  
Net loss per share diluted, Continued operations R$ (1.49) R$ (2.96) R$ 0.62
Net loss for the year attributable to controlling shareholders, Discontinued operations   R$ (50,948)  
Weighted average number of outstanding shares - basic, Discontinued operations 1,360,268,402 1,052,606,000  
Net loss per share basic, Discontinued operations   R$ (0.05)  
Weighted average number of outstanding shares - diluted, Discontinued operations 1,360,268,402 1,052,606,000  
Net loss per share diluted, Discontinued operations   R$ (0.05)  
Net loss for the period attributable to controlling shareholders, Continued and discontinued operations R$ (2,028,559) R$ (3,166,403)  
Weighted average number of outstanding shares - basic, Continued and discontinued operations 1,360,268,402 1,052,606,000  
Net earnings (loss) per share basic, Continued and discontinued operations R$ (1.49) R$ (3.01)  
Weighted average number of outstanding shares - diluted, Continued and discontinued operations 1,360,268,402    
Weighted average number of outstanding shares - diluted, Continued and discontinued operations   1,052,606,000  
Net loss per share diluted, Continued and discontinued operations R$ (1.49) R$ (3.01)