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Fair value of financial instruments - Disclosure of detailed information about changes in fair value of investments (Details) - Level 3 [Member] - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of fair value measurement of assets [line items] |  |
Balance - January 1 | $ 59,600 | $ 8,092
Acquisitions | 2,885 | 3,093
Deemed acquisition | 0 | 46,625
Disposal | (58,641) | 0
Warrants exercised | (1,055) | 0
Balance - December 31 | 1,700 | 59,600
Warrants Exercised [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Change in fair value | (250) | 0
Warrants Expired [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Change in fair value | (165) | (1,180)
Investments held at the end of the period [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Change in fair value | $ (674) | $ 2,970

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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