| 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 | ||||||||
| General and administrative | ||||||||
| Research and development | — | — | — | |||||
| Stock-based compensation | — | — | — | |||||
| Depreciation | — | — | — | |||||
| Change in fair value of legal settlement liability | — | — | — | |||||
| Total operating expenses | — | — | — | |||||
| Loss from operations | ||||||||
| Other income (loss) | ||||||||
| Change in fair value of Simple Agreements for Future Equity | — | — | — | |||||
| Change in fair value of warrant liabilities | ||||||||
| Total other income (loss) | — | — | — | |||||
| Income (loss) before provision for income taxes | ||||||||
| Provision for income taxes | ||||||||
| Net income (loss) and comprehensive income (loss) | ||||||||
| Undistributed earnings allocated to participating securities | — | — | — | |||||
| Net income (loss) attributable to common shareholders | ||||||||
| Net income (loss) per share - Basic | ||||||||
| Net loss per share - Diluted | — |