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Accounts Receivable, Prepaid Expenses and Deposits - Additional Information (Detail) $ in Thousands, R$ in Millions | Dec. 31, 2019 USD ($) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 BRL (R$)
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Disclosure Of Accounts Receivables Prepaid Expenses And Deposits [Line Items] |  |  |  |
Value-added and income tax receivables | $ 12,181 |  | $ 5,276 |
Receivables from sale of assets | $ 12,000 |  |  |
Receivables interest rate | 10.00% | 10.00% |  |
Brazilian Federal Government [member] |  |  |  |
Disclosure Of Accounts Receivables Prepaid Expenses And Deposits [Line Items] |  |  |  |
Value-added and income tax receivables | $ 12,800 | R$ 51.5 |  | R$ 12.9
Federal Tax Authority [member] |  |  |  |
Disclosure Of Accounts Receivables Prepaid Expenses And Deposits [Line Items] |  |  |  |
Value-added and income tax receivables | 3,400 |  | $ 0 |
Maranho state government [member] |  |  |  |
Disclosure Of Accounts Receivables Prepaid Expenses And Deposits [Line Items] |  |  |  |
Value-added and income tax receivables | $ 1,100 | R$ 4.5 |  | R$ 4.6

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