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Investment in associates (Details 2)
$ in Thousands
Jun. 30, 2022
CAD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
CAD ($)
Dec. 31, 2021
CAD ($)
Statement [Line Items]        
Current liabilities $ (3,784,000)     $ (5,116,000)
Net assets 216,981,000     167,018,000
Company s equity share of net assets of associate 58,700,000 $ 58,700 $ 59,990,000 0
Dolly Varden [Member]        
Statement [Line Items]        
Current assets   22,866    
Non-current assets   157,440    
Current liabilities   (3,689)    
Non-current liabilities   0    
Net assets   176,617    
Company s equity share of net assets of associate 58,584,000 58,584 59,990,000 0
UMS [Member]        
Statement [Line Items]        
Current assets   1,209    
Non-current assets   2,791    
Current liabilities   (2,013)    
Non-current liabilities   1,523    
Net assets   464    
Company s equity share of net assets of associate $ 116,000 $ 116 $ 0 $ 0