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Right to Use Assets and Leases payable - Details about lease contracts of low amount assets (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Lease Contracts of Low Amount Assets [Line Items]    
Lease payments to be payable R$ 7,292 R$ 9,502
Up to 1 year    
Disclosure of Lease Contracts of Low Amount Assets [Line Items]    
Lease payments to be payable 1,147 3,474
Between 1 and 5 years    
Disclosure of Lease Contracts of Low Amount Assets [Line Items]    
Lease payments to be payable 6,145 6,028
More than 5 years    
Disclosure of Lease Contracts of Low Amount Assets [Line Items]    
Lease payments to be payable