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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of cash and cash equivalents [line items]    
Short-term bank deposits R$ 968,342 R$ 297,929
Brazilian Real [member]    
Disclosure of cash and cash equivalents [line items]    
Short-term bank deposits 910,080 235,488
U.S. dollars [member]    
Disclosure of cash and cash equivalents [line items]    
Short-term bank deposits R$ 58,262 R$ 62,441