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Short-term investments (Narrative) (Details) - CAD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Short Term Investments [Line Items] |  |
Short-term investments | $ 0 | $ 3,501
Notes receivable [Member] |  |
Short Term Investments [Line Items] |  |
Interest rate, investment |  | 12.00%

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- Definition The amount of current investments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Interest rate, investment + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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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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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |