Basis of Presentation (Narrative) (Details)	12 Months Ended
Dec. 31, 2017
Basis of Accounting [abstract]
Description of functional currency	United States Dollars ("$" or "US$")
Description of presentation currency	financial statements are presented in United States Dollars ("$" or "US$")

The description of the currency of the primary economic environment in which the entity operates.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 21
-IssueDate 2017-01-01
-Paragraph 53
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_53&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 21
-IssueDate 2017-01-01
-Paragraph 57
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_57_c&doctype=Standard
-URIDate 2017-03-09

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Period Type:	duration