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Earnings (loss) per share - Schedule of earnings (loss) per share (Details) - shares
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2019
Dec. 31, 2018
Earnings per share [abstract]          
Issued common shares 383,996 699,511 589,518 383,996 3
Effect of shares issued from:          
Exercise of warrants 0 10,593 4,383    
Issuance of bonus shares 0 8,262 0    
Private placements 45,665 4,571 21,810    
Conversion of stock units 0 3,703 31    
Acquisition of Police Ordnance 0 3,144 0    
Conversion of contingent shares 0 386 0    
Debt settlements 0 132 1,038    
Conversion of directors converted loans 0     101,174  
Conversion of parent company converted loans 0     126,055  
Exercise of options 447 0 9,118 0  
Asset acquisitions 1,272 0 6,027    
Amended license agreement 0 0 626    
Exercise of broker options 0 0 170    
Conversion of convertible notes, including interest 7,126 0 0 21,769  
Services rendered 1,373 0 0    
Foremost's QT 752 0 0    
Issuance for services 1,373     0  
Issuance for technology acquisition 1,272     0  
Issuance of for equity private placements 45,665     0  
Qualifying transaction 752     0  
Weighted average number of basic common shares 440,631 730,302 632,721 249,001  
Dilutive securities:          
Stock options 0 0 0 0  
Warrants 0 0 0 0  
Weighted average number of dilutive common shares 440,631 730,302 632,721 249,001