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25. Expenses by Nature (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Expenses By Nature Details Narrative
Research and development expenses	R$ 55,836	R$ 50,129	R$ 41,368

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- References

No definition available.

+ Details

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- Definition

The amount of expenditure directly attributable to research or development activities, recognised in profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2016-01-13
-Paragraph 126
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2016-03-30&anchor=para_126&doctype=Standard
-URIDate 2016-03-31

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration