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Disclosure of deferred taxes (Details) - CAD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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Statement [Line Items] |  |  |
Deferred income tax liability | $ (1,820,307) | $ (4,753,324) | $ (6,501,886)
Royalty interest [Member] |  |  |
Statement [Line Items] |  |  |
Deferred income tax liability | (4,159,013) | (8,090,497) | (9,053,435)
Tax loss carryforwards [Member] |  |  |
Statement [Line Items] |  |  |
Deferred income tax liability | 2,261,886 | 3,212,368 | 2,433,008
Other [Member] |  |  |
Statement [Line Items] |  |  |
Deferred income tax liability | $ 76,820 | $ 124,805 | $ 118,541

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- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [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 g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_o&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_56&doctype=Standard -URIDate 2017-03-09 + Details
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