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Disclosure of temporary difference, unused tax losses and unused tax credits (Details) - CAD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Tax loss carryforwards [Member] |  |  |
Statement [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 42,094,000 | $ 39,318,000 | $ 37,728,000
Exploration and evaluation assets [Member] |  |  |
Statement [Line Items] |  |  |
Deductible temporary differences for which no deferred tax asset is recognised | 1,485,000 | 2,137,000 | 10,022,960
Other [Member] |  |  |
Statement [Line Items] |  |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 10,425,000 | $ 11,371,000 | $ 8,385,770

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
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