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4. Changes in accounting practices and disclosures (Details)	12 Months Ended
	Dec. 31, 2017
Standard One
SummaryOfChangesInAccountingPracticesAndDisclosuresLineItems [Line Items]
New standards and revisions	Standard: Amendments to IAS 12 – Recognition of Deferred Income Tax for Unrealized Losses Description: Describes about the treatment of temporary differences. Impact: The application of this amendment did not impact the disclosures or amounts recognized in the annual financial statements.
Standard Two
SummaryOfChangesInAccountingPracticesAndDisclosuresLineItems [Line Items]
New standards and revisions	Standard: Amendments to IAS 7 – Disclosure Initiatives Description: Describes about disclosures that enable users to measure the changes in liabilities related to financing activities. Impact: The application of these amendments did not impact the disclosures or amounts recognized in the annual financial statements.
Standard Three
SummaryOfChangesInAccountingPracticesAndDisclosuresLineItems [Line Items]
New standards and revisions	Standard: Annual improvements to IFRSs: 2015-2017 cycle Description: Amendments to IFRS 12 – Disclosure of interests in other entities – clarification on the standard’s scope. Impact: The application of this amendment did not impact the disclosures or amounts recognized in the annual financial statements.

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The discussion of the impact that the initial application of a new IFRS is expected to have on financial statements.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 8
-IssueDate 2017-01-01
-Paragraph 31
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=8&date=2017-03-01&anchor=para_31_e_i&doctype=Standard
-URIDate 2017-03-09

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