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Consolidated Statements of Operations Information - Inventories as costs of goods sold (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Consolidated Statements of Operations Information      
Net (liabilities) assets in excess of considerations received $ (273)   $ 331
Reclassification adjustment for the exchange differences upon dispositions of subsidiaries 9   215
(Gain) loss on dispositions of subsidiaries, net (264)   546
Inventories as costs of goods sold (including depreciation expenses allocated to costs of goods sold) $ 80 $ 3,488 $ 5,041