| 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 income | — | |||||||||||||||
| Net loss | ||||||||||||||||
| Net loss per share - basic and diluted (in dollars per share) | — |