Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Estimated Fair Value on a Recurring Basis (Details) - Fair Value Measurements Recurring - CAD ($) $ in Thousands |
Jun. 30, 2026 |
Mar. 31, 2026 |
|---|---|---|
| Assets: | ||
| Restricted short-term investments | $ 5,058 | $ 5,046 |
| Other investments | 123,568 | 106,025 |
| Liabilities: | ||
| Warrant derivative liability | 26,863 | 27,522 |
| Level 1 | ||
| Assets: | ||
| Restricted short-term investments | 5,058 | 5,046 |
| Other investments | 47 | 46 |
| Level 3 | ||
| Assets: | ||
| Other investments | 123,521 | 105,979 |
| Liabilities: | ||
| Warrant derivative liability | $ 26,863 | $ 27,522 |