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14 Prepaid Expenses (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | R$ 51,281 | R$ 73,778 |
Amortization | (16,434) | (22,497) |
Asset value to recover as renegotiation of GSF, ending | 34,847 | 51,281 |
Risk premium to be amortized - prepaid expenses | 3,180 | 12,574 | R$ 28,033
Grant extension period - intangible | 31,667 | 38,707 | R$ 45,745
Risk Premium - Current Asset [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | 9,394 | 15,459 |
Amortization | (9,394) | (15,459) |
Transfers | 3,180 | 9,394 |
Asset value to recover as renegotiation of GSF, ending | 3,180 | 9,394 |
Risk Premium Noncurrent Asset [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | 3,180 | 12,574 |
Transfers | (3,180) | (9,394) |
Asset value to recover as renegotiation of GSF, ending |  | 3,180 |
Intangible [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | 38,707 | 45,745 |
Amortization | (7,040) | (7,038) |
Asset value to recover as renegotiation of GSF, ending | R$ 31,667 | R$ 38,707 |

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- Definition Amount refers to the asset value to recover as renegotiation of GSF. + References No definition available. + Details
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