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Assets held for sale (Narrative) (Details)
12 Months Ended
Dec. 31, 2021
CAD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Disclosure Of Assets Held For Sale [Line Items]        
Proceeds from disposal of assets held for sale $ 16,500,000      
Deposit received for sale of assets held for sale $ 660,000      
Cobourg facility        
Disclosure Of Assets Held For Sale [Line Items]        
Proceeds from sale of equipment     $ 36,616  
Loss on sale of equipment   $ 0 100,337 $ 0
Proceeds from sales of inventories     1  
Loss on disposal of inventory     197,436  
Impairment of equipment   $ 0 $ 387,474 $ 0