| 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 |
|---|---|---|---|---|---|---|---|---|
| Operating expenses | ||||||||
| Research and development | ||||||||
| General and administrative | ||||||||
| Total operating loss | ||||||||
| Non-operating income | ||||||||
| Interest income | ||||||||
| Realized gain on sale of marketable securities, net | ||||||||
| (Loss) gain on change in fair value of derivative instruments | ||||||||
| Total non-operating income (loss) | ||||||||
| Loss before income tax | ||||||||
| Income tax provision | ||||||||
| Net loss | ||||||||
| Net loss per share, basic | — | |||||||
| Net loss per share, diluted | — |