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Deferred Revenue - Deferred revenue in subsidiaries (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Summary of deferred revenue [line items]    
Deferred revenue R$ 18,282 R$ 27,626
Current 18,282 27,626
Franchising upfront fee [member]    
Summary of deferred revenue [line items]    
Deferred revenue 814 956
Loyalty program one [member]    
Summary of deferred revenue [line items]    
Deferred revenue 15,424 25,096
Loyalty program two [member]    
Summary of deferred revenue [line items]    
Deferred revenue R$ 2,044 R$ 1,574