| Line Item | Jun 30, 2026 | Mar 31, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Dec 31, 2024 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Dec 31, 2023 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Dec 31, 2022 | Sep 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating expenses: | ||||||||||||||||
| Research and development | ||||||||||||||||
| General and administrative | ||||||||||||||||
| Total operating expenses | ||||||||||||||||
| Loss from operations | ||||||||||||||||
| Interest and other income, net | ||||||||||||||||
| Loss before provision for income taxes | ||||||||||||||||
| Provision for income taxes | ||||||||||||||||
| Net loss attributable to ordinary shareholders | ||||||||||||||||
| Net loss per share attributable to ordinary shareholders, basic (in dollars per share) | ||||||||||||||||
| Net loss per share attributable to ordinary shareholders, diluted (in dollars per share) |