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Share capital and Contributed Surplus - Schedule of number and weighted average exercise prices of share options (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 share $ / shares shares | Sep. 30, 2022 share $ / shares | Sep. 30, 2021 share $ / shares | Dec. 31, 2019 share $ / shares
Disclosure of classes of share capital [abstract] |  |  |  |
Options outstanding, beginning of the period | share | 0 | 59,536 | 28,838 |
Number of share options granted | share | 29,357 | 9,500 | 52,988 | 0
Options from the Foremost qualifying transaction | shares | 1,224 |  |  |
Number of share options exercised | share | (1,743) |  | (18,194) |
Number of share options cancelled | share |  | (11,928) | (4,096) |
Options outstanding, end of the period | share | 28,838 | 57,108 | 59,536 | 0
Number of share options exercisable | share | 7,474 | 43,618 |  |
Weighted average exercise price, beginning of the period | $ 0 | $ 95.9 | $ 45.5 |
Weighted average exercise price of share options granted | 45.5 | 69.59 | 104.3 |
Weighted average exercise price of share options granted from Foremost qualifying transaction | 32.9 |  |  |
Weighted average exercise price of share options exercised | 35 |  | 50.4 |
Weighted average exercise price of share options cancelled |  | 131.76 | 48.3 |
Weighted average exercise price, end of the period | 45.5 | 83.87 | $ 95.9 | $ 0
Weighted average exercise price of share options exercisable | $ 42 | $ 83.9 |  |

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