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Trade Accounts Payable - Schedule of Trade Accounts Payable (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Trade and Other Current Receivables [line items]    
Trade accounts payable R$ 97,825 R$ 117,836
Other [member]    
Trade and Other Current Receivables [line items]    
Trade accounts payable 2,648 428
Domestic trade accounts payable [member]    
Trade and Other Current Receivables [line items]    
Trade accounts payable 94,887 115,672
Foreign suppliers [member]    
Trade and Other Current Receivables [line items]    
Trade accounts payable R$ 290 R$ 1,736