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20. SHAREHOLDERS' EQUITY (Details 2) - BRL (R$) R$ / shares in Units, R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Shareholders Equity Details 2Abstract |  |
Treasury share purchased | 7,409,500 |
Amount paid for treasury share | R$ 58,264 | R$ 238,976
Minimum share price | R$ 4.48 |
Maximum share price | 10.07 |
Average share price | R$ 7.86 |
Treasury share market price | R$ 65,500 |

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