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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%