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Disclosure of detailed information about exploration and evaluation expenditures (Details) - CAD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Statement [Line Items] |  |
Exploration and evaluation assets, beginning of period | $ 38,722,318 | $ 36,389,795
Acquisition costs |  | 617,767
Claims maintenance | 10,605 | 21,314
Engineering | 183,165 | 337,039
Permitting | 1,317,578 | 766,263
Salary and wages | 347,887 | 540,744
Share-based payments | 68,994 | 49,396
Exploration and evaluation assets, end of period | $ 40,650,547 | $ 38,722,318

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- Definition The amount of assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2017-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=6&date=2017-03-01&anchor=para_24_b&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Acquisition costs + References No definition available. + Details
Name: | wrn_AcquisitionCostsForExplorationAndEvaluationExpenditures
Namespace Prefix: | wrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Claims maintenance + References No definition available. + Details
Name: | wrn_ClaimsMaintenance
Namespace Prefix: | wrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Engineering + References No definition available. + Details
Name: | wrn_Engineering
Namespace Prefix: | wrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Permitting + References No definition available. + Details
Name: | wrn_Permitting
Namespace Prefix: | wrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Salary and wages + References No definition available. + Details
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Namespace Prefix: | wrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Statement [Line Items] + References No definition available. + Details
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Namespace Prefix: | wrn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration