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26. Gain (loss) on Disposal of Property, Plant, and Equipment and Intangibles (Details Narrative) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Gain Loss On Disposal Of Property Plant And Equipment And Intangibles Details Narrative      
Gain (loss) on disposal of property, plant, and equipment R$ (2,242) R$ (6,134) R$ 27,276