| Line Item | Jul 31, 2026 | Apr 30, 2026 | Jan 31, 2026 | Oct 31, 2025 | Jul 31, 2025 | Apr 30, 2025 | Jan 31, 2025 | Oct 31, 2024 | Jul 31, 2024 | Apr 30, 2024 | Jan 31, 2024 | Oct 31, 2023 | Jul 31, 2023 | Apr 30, 2023 | Jan 31, 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating expenses: | |||||||||||||||
| Research and development | |||||||||||||||
| General and administrative | |||||||||||||||
| Total operating expenses | |||||||||||||||
| Loss from operations | |||||||||||||||
| Other expenses (income), net: | |||||||||||||||
| Interest income | |||||||||||||||
| Interest expense | |||||||||||||||
| Loss on extinguishment of debt | — | ||||||||||||||
| Other expenses, net | — | ||||||||||||||
| Total other income, net | |||||||||||||||
| Net loss before income taxes | |||||||||||||||
| Net loss | |||||||||||||||
| Net loss per share of common shares, basic | |||||||||||||||
| Net loss per share of common shares, diluted |