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Debentures - Summary of Detailed Information About Debentures Issued (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2020
BRL (R$)
Unit
Dec. 31, 2019
BRL (R$)
Unit
Dec. 31, 2018
BRL (R$)
Disclosure of detailed information about borrowings [line items]      
Quantity | Unit 800,000 800,000  
Book value R$ 844,361,000 R$ 835,230,000 R$ 406,538,000
Debenture One [member]      
Disclosure of detailed information about borrowings [line items]      
Quantity | Unit 400,000 400,000  
Annual rate 108.00% 1080.00%  
Issuance date 9/28/2018 9/28/2018  
Maturity date 9/28/2020 9/28/2020  
Unit value at issuance R$ 1,000.00 R$ 1,000.00  
it value at period-end 1,093.87 1,082.01  
Book value R$ 438,010,000 R$ 433,262,000  
Debenture Two [member]      
Disclosure of detailed information about borrowings [line items]      
Quantity | Unit 400,000 400,000  
Annual rate 107.50% 1075.00%  
Issuance date 5/15/2019 5/15/2019  
Maturity date 5/15/2022 5/15/2022  
Unit value at issuance R$ 1,000.00 R$ 1,000.00  
it value at period-end 1,016.83 1,005.88  
Book value R$ 406,351,000 R$ 401,968,000