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Short-term investments (Narrative) (Details) $ in Thousands, $ in Millions | Dec. 31, 2023 CAD ($) Rate | Dec. 31, 2023 USD ($) Rate | Dec. 31, 2022 CAD ($)
--- | --- | --- | ---
Short Term Investments [Line Items] |  |  |
Short-term investments | $ | $ 8,200 |  | $ 0
Notes receivable [Member] |  |  |
Short Term Investments [Line Items] |  |  |
Short-term investments | $ 8,200 | $ 6.2 |
Interest rate, investment | Rate | 18.50% | 18.50% |

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- Details
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