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Bank indebtedness (Narrative) (Details)
$ in Thousands, $ in Thousands
Dec. 31, 2021
CAD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Corporate Credit Cards [Member]      
Line of Credit Facility [Line Items]      
Long-term Line of Credit $ 75 $ 59 $ 60
Foreign Exchange Contract [Member]      
Line of Credit Facility [Line Items]      
Long-term Line of Credit $ 425 $ 335