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21. EQUITY (Details Narrative) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Jul. 22, 2009
Dec. 31, 2020
Equity    
Capital subscribed and paid   R$ 12,553,418
Number of shares issued   812,473,246
Public offering expenses, net R$ 92,947  
Number of shares authorised   1,000,000,000
Number of treasury shares   4,766,084
Par value per share (in dollars per share)   R$ 26
Market value of treasury shares   R$ 105,044
Shares repurchased   4,836,000
Shares repurchased amount   R$ 106,070
Accumulated losses   R$ 1,524,997