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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 |

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