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6 Bonds and Securities (Details) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities |  | R$ 282,081 | R$ 344,296
Bonds and securities, current |  | 3,112 | 124,862
Bonds and securities, noncurrent |  | 278,969 | 219,434
Committed Operation [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities |  | R$ 3,632 | 6,116
Index |  | 96.5% to 100% of CDI |
Bank Deposit Certificates - CDB [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities |  | R$ 50,216 | 50,629
Index |  | 95.0% to 101% of CDI |
Financial Treasury Bonds - LFT [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities |  | R$ 733 | 696
Index |  | Selic |
National Treasury Bills - LTN [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities |  | R$ 1,696 |
Index |  | CDI |
Quotas in Funds [Member] |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Bonds and securities | [1] | R$ 225,804 | R$ 286,855
Index | [1] | CDI |
[1] | These are fixed income funds in the Parent Company and reserve accounts intended to comply with contracts with BNDES, in other companies.

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