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SHARE CAPITAL - Narrative - Stock options (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Mar. 07, 2025 CAD ($) shares $ / shares | Nov. 27, 2024 CAD ($) shares $ / shares | Aug. 15, 2024 CAD ($) shares $ / shares | May 05, 2024 CAD ($) shares $ / shares | Apr. 05, 2024 CAD ($) shares $ / shares | Mar. 20, 2024 CAD ($) shares $ / shares | Nov. 16, 2023 CAD ($) shares $ / shares | Sep. 26, 2023 CAD ($) shares $ / shares | Jun. 29, 2023 CAD ($) shares $ / shares | Mar. 31, 2025 CAD ($) shares | Mar. 31, 2024 CAD ($) shares | Nov. 05, 2020
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Shares available for grant, percent of total shares outstanding (up to) |  |  |  |  |  |  |  |  |  |  |  | 20.00%
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  |  |  |  | 3,484,626 | 1,011,711 |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  |  |  |  | $ 47,427 |  |
Share-based compensation | $ |  |  |  | $ 1,185 |  |  |  |  |  | 42,869 | $ 13,886 |
Option Expiration Period Thirty Two |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  | $ 21.28 |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  | $ 4,619 |  |  |  |  | 3,742 |  |
Option Expiration Period Thirty Two | Share Options, Vesting, First Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  | 38,536 |  |  |  |  |  |  |
Option Expiration Period Thirty Two | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  | 269,758 |  |  |  |  |  |  |
Award vesting period |  |  |  |  | 2 years |  |  |  |  |  |  |
Option Expiration Period Thirty Four |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  | $ 13.11 |  |  |  |  |  |  |  |  |
Award vesting period |  |  | 2 years |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  | $ 34,822 |  |  |  |  |  |  | 34,032 |  |
Option Expiration Period Thirty Five |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  | $ 14.37 |  |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  | $ 982 |  |  |  |  |  |  |  | 507 |  |
Option Expiration Period Thirty Five | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  | 2 years |  |  |  |  |  |  |  |  |  |
Option Expiration Period Thirty Six |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares | $ 10.45 |  |  |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ | $ 307 |  |  |  |  |  |  |  |  | 109 |  |
Option Expiration Period Thirty Six | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period | 1 year |  |  |  |  |  |  |  |  |  |  |
Option Expiration Period Twenty Nine |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  |  |  | $ 16.72 |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  |  |  | $ 4,080 | 3,710 |  |
Option Expiration Period Twenty Nine | Share Options, Vesting, First Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  |  | 39,474 |  |  |
Option Expiration Period Twenty Nine | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  |  | 18,422 |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 3 months |  |  |
Option Expiration Period Twenty Nine | Share Options, Vesting, Third Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  |  | 2,632 |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 1 year |  |  |
Option Expiration Period Twenty Nine | Share Options, Vesting, Fourth Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  |  | 245,133 |  |  |
Award vesting period |  |  |  |  |  |  |  |  | 2 years |  |  |
Option Expiration Period Twenty Four And Thirty |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  |  | $ 577 |  |  |  |
Option Expiration Period Twenty Four And Thirty | Share Options, Vesting, First Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  | 9,868 |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 3 months |  |  |  |
Option Expiration Period Twenty Four And Thirty | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  | 5,263 |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 6 months |  |  |  |
Option Expiration Period Twenty Four And Thirty | Share Options, Vesting, Third Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  | 10,526 |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 1 year |  |  |  |
Option Expiration Period Twenty Four And Thirty | Share Options, Vesting, Fourth Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  | 2,632 |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 15 months |  |  |  |
Option Expiration Period Twenty Four And Thirty | Share Options, Vesting, Fifth Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  |  | 3,553 |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 18 months |  |  |  |
Option Expiration Period Twenty Four |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  |  | $ 30.02 |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  |  |  |  | 439 |  |
Option Expiration Period Thirty |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  |  | $ 30.02 |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  |  |  |  | 59 |  |
Option Expiration Period Thirty Seven And Thirty Eight |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  |  | $ 10,907 |  |  |  |  |
Option Expiration Period Thirty Seven And Thirty Eight | Share Options, Vesting, First Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  | 496,052 |  |  |  |  |
Option Expiration Period Thirty Seven And Thirty Eight | Share Options, Vesting, Second Tranche |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of options vested (in shares) |  |  |  |  |  |  | 177,630 |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 2 years |  |  |  |  |
Option Expiration Period Thirty Seven |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  | $ 27.17 |  |  |  |  |
Option Expiration Period Thirty Eight |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  | $ 27.17 |  |  |  |  |
Option Expiration Period Thirty One |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  | $ 21.28 |  |  |  |  |  |
Award vesting period |  |  |  |  |  | 2 years |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  | $ 8 |  |  |  | $ 8 |  |
Common shares |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  | 80,100 | 3,061,232 |  | 308,294 |  | 673,682 | 31,842 | 305,661 |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  |  | $ 30.02 |  |  |  |
Number of share options forfeited in share-based payment arrangement |  |  |  | 1,199,655 |  |  |  |  |  |  |  |
Common shares | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price of share options forfeited in share-based payment arrangement (in CAD per share) | $ / shares |  |  |  | $ 27.17 |  |  |  |  |  |  |  |
Common shares | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price of share options forfeited in share-based payment arrangement (in CAD per share) | $ / shares |  |  |  | $ 119.7 |  |  |  |  |  |  |  |
Common shares | Option Expiration Period Thirty Two |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  | $ 21.28 |  |  |  |  |  |  |
Common shares | Option Expiration Period Thirty Four |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  | $ 13.11 |  |  |  |  |  |  |  |  |
Common shares | Option Expiration Period Thirty Five |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  | $ 14.37 |  |  |  |  |  |  |  |  |  |
Common shares | Option Expiration Period Thirty Six |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares | $ 10.45 |  |  |  |  |  |  |  |  |  |  |
Common shares | Option Expiration Period Twenty Nine |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  |  |  | $ 16.72 |  |  |
Common shares | Option Expiration Period Twenty Four |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  |  | 25,657 |  |  |  |
Common shares | Option Expiration Period Thirty |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  |  | 6,185 |  |  |  |
Common shares | Option Expiration Period Thirty Seven And Thirty Eight |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  |  | $ 27.17 |  |  |  |  |
Common shares | Option Expiration Period Thirty Seven |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  | 13,158 |  |  |  |  |
Common shares | Option Expiration Period Thirty Eight |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  | 660,524 |  |  |  |  |
Common shares | Option Expiration Period Thirty One |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted (in CAD per share) | $ / shares |  |  |  |  |  | $ 21.28 |  |  |  |  |  |
Common shares | Granted to officers and directors |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  | 1,980,888 |  |  |  |  |  |  |  |  |
Common shares | Granted to officers |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  | 144,738 |  | 584,211 |  | 99,027 |  |  |
Common shares | Granted to directors |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  |  |  |  |  |  | 42,104 |  | 20,659 |  |  |
Common shares | Granted to employees |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) |  | 73,100 | 940,168 |  | 134,872 | 526 | 34,209 | 3,553 | 105,026 |  |  |
Common shares | Granted to consultants |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement (in shares) | 35,000 | 7,000 | 140,176 |  | 28,684 |  | 13,158 | 28,289 | 80,949 |  |  |

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