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Loans, Debentures, and Finance Leases - Summary of Equipment and Intangible Assets, Net of Depreciation and Amortization, and Corresponding Liabilities (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2017
Disclosure of loans debentures and finance leases [abstract]      
Equipment and intangible assets, net of depreciation and amortization R$ 13,783 R$ 15,732  
Financing (present value) 46,066 48,515  
Current 2,849 2,710 R$ 2,615
Non-current R$ 43,217 R$ 45,805 R$ 46,101