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14 Prepaid Expenses (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of fair value measurement of assets [line items] |  |
Prepaid expenses | R$ 33,695 | R$ 44,109
Prepaid expenses, current | 33,563 | 40,819
Prepaid expenses, noncurrent | 132 | 3,290
Risk Premium - GSF Renegotiation [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Prepaid expenses | 3,180 | 12,574
Others [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Prepaid expenses | R$ 30,515 | R$ 31,535

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