Significant accounting policies and basis of preparation (Narrative) (Details)	Dec. 31, 2019 CAD ($)
Disclosure Of Significant Accounting Policies And Basis Of Preparation [Abstract]
Fair value of restoration obligations	$ 200,000

The amount of non-current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2018-01-01
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-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
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Name:	ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant