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14 Prepaid Expenses (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | R$ 34,847 | R$ 24,628 |
Amortization | (10,219) | (16,434) |
Transfers |  |  |
Asset value to recover as renegotiation of GSF, ending | 24,628 | 34,847 |
Risk premium to be amortized - prepaid expenses |  | 3,180 | R$ 12,574
Grant extension period - intangible | 24,628 | 31,667 | R$ 38,707
Intangible [member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | 31,667 | 38,707 |
Amortization | (7,039) | (7,040) |
Transfers |  |  |
Asset value to recover as renegotiation of GSF, ending | 24,628 | 31,667 |
Risk Premium - Current Asset [member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Asset value to recover as renegotiation of GSF, beginning | 3,180 | (3,180) |
Amortization | (3,180) | (9,394) |
Transfers |  | 3,180 |
Asset value to recover as renegotiation of GSF, ending |  | 3,180 |
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 |
Amortization |  |  |
Transfers |  | (3,180) |
Asset value to recover as renegotiation of GSF, ending |  |  |

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