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Income taxes - Schedule of deferred tax assets (liabilities) (Details) - CAD ($)
Dec. 31, 2019
Dec. 31, 2018
Income taxes paid (refund) [abstract]    
Other investments $ (168,092) $ (1,334,000)
Capital losses carried forward 168,092 1,334,000
Deferred tax liabilities not recognized $ 0 $ 0