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Share Capital (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 15, 2022 | Jun. 07, 2022 | Jul. 16, 2020 | Jan. 31, 2023 | Jan. 31, 2022 | Jan. 31, 2021
Share Capital |  |  |  |  |  |
Proceeds from Stock Options Exercised |  |  |  | $ 1.7 | $ 2.7 | $ 6.2
2022 Base Shelf Prospectus |  |  |  |  |  |
Share Capital |  |  |  |  |  |
Shelf Prospectus Period (Month) | 25 months |  |  |  |  |
Stock issued during period, shares, new issues (in shares) | 0 |  |  |  |  |
2020 Base Shelf Prospectus |  |  |  |  |  |
Share Capital |  |  |  |  |  |
Stock issued during period, shares, new issues (in shares) |  |  | 0 |  |  |
NCIB |  |  |  |  |  |
Share Capital |  |  |  |  |  |
Stock issued during period, shares, new issues (in shares) |  | 0 |  |  |  |
Number of shares to be purchased for cancellation |  | 7,400,000 |  |  |  |
Maximum percentage of shares to be repurchased for cancellation |  | 10.00% |  |  |  |

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