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4. FINANCIAL INVESTMENTS (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
FinancialInvestmentsLineItems [Line Items] |  |  |
Current |  | R$ 2,633,173 | R$ 895,713
NonCurrent |  | 95,719 | 7,772
CDB - Certificate Of Bank Deposit [Member] |  |  |
FinancialInvestmentsLineItems [Line Items] |  |  |
Current | [1] | 481,409 | 882,376
Government Securities [Member] |  |  |
FinancialInvestmentsLineItems [Line Items] |  |  |
Current | [2] | 37,144 | 13,337
Time Deposit [Member] |  |  |
FinancialInvestmentsLineItems [Line Items] |  |  |
NonCurrent | [3] |  | R$ 7,772
Usiminas Shares [Member] |  |  |
FinancialInvestmentsLineItems [Line Items] |  |  |
Current | [4] | 2,114,620 |
Bonds [Member] |  |  |
FinancialInvestmentsLineItems [Line Items] |  |  |
NonCurrent | [5] | R$ 95,719 |
[1] | Financial investment with restricted modality and linked to Bank Certificate of Deposit to secure a letter of guarantee from financial institutions.
[2] | Investments in National Treasury Bills (LFT) managed by its exclusive funds.
[3] | As of December 31, 2019, the investments in Time Deposit in custody to cover additional expenses of the sale of LLC was fully redeemed.
[4] | In December 2019, the Company opted to reclassify Usiminas' investment to current assets (see notes 8.f and 12.II), and part of the shares guarantees a portion of the Company's debt.
[5] | Bonds with Fibra Bank due in February 2028.

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