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Capital management (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of objectives, policies and processes for managing capital [abstract] |  |
Equity attributable to shareholders of the Company | $ 88,058 | $ 87,144

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- Definition The amount of equity attributable to the owners of the parent. This specifically excludes non-controlling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph r -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_r&doctype=Standard -URIDate 2017-03-09 + Details
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