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Share Capital - Additional Information (Details) $ / shares in Units, $ in Thousands, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 07, 2025 USD ($) | Feb. 23, 2024 USD ($) | Apr. 30, 2026 CAD ($) shares | Apr. 30, 2025 USD ($) shares | Apr. 30, 2025 CAD ($) shares | Apr. 30, 2024 CAD ($) shares | Apr. 30, 2024 $ / shares shares
Disclosure Of Classes Of Share Capital [Line Items] |  |  |  |  |  |  |
Share-based payments |  |  | $ 1,275 |  | $ 445 | $ 1,535 |
Number of underwritten public offering shares | shares |  |  |  |  |  | 1,265,000 |
Number of shares exercise by underwriter of over allotment option | shares |  |  |  |  |  | 165,000 |
Public offering price for each common share | $ / shares |  |  |  |  |  |  | $ 1
Restricted Stock Units |  |  |  |  |  |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |  |  |  |  |  |
Share-based payments |  |  | $ 1,200 |  | 0 | $ 0 |
At The Market Equity Offering Facility |  |  |  |  |  |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |  |  |  |  |  |
Common stock aggregate gross sales price | $ 30.0 |  |  |  |  |  |
Number of common shares sold/issued | shares |  |  | 533,969 | 13,315,850 |  |  | 629,240
Proceeds from sale of common shares |  |  | $ 900 |  | $ 12,200 | $ 1,800 |
Share Capital | Common Shares |  |  |  |  |  |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |  |  |  |  |  |
Shares issued pursuant to conversion of convertible debentures, Number of Shares | shares |  |  |  | 5,893,768 | 5,893,768 |  |
Convertible debentures |  |  |  | $ 3.0 |  |  |
Debt conversion principal debt amount |  |  |  | $ 3.0 |  |  |
Common Shares | Top of Range | At The Market Equity Offering Facility |  |  |  |  |  |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |  |  |  |  |  |
Common stock aggregate gross sales price |  | $ 60.0 |  |  |  |  |

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