Identification and business activity (Details 1) - Mining activities [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of identification and business activity [Line Items]
Operating activities	$ (6)	$ (8)	$ (7)
Net decrease in cash and cash equivalents during the year	$ (6)	$ (8)	$ (7)

The cash flows from (used in) the entity's operating activities, related to discontinued operations. [Refer: Discontinued operations [member]; Cash flows from (used in) operating activities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 5
-IssueDate 2018-01-01
-Paragraph 33
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=5&date=2018-03-01&anchor=para_33_c&doctype=Standard
-URIDate 2018-03-16

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