| Line Item | Jun 30, 2026 | Mar 31, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 |
|---|---|---|---|---|---|---|---|
| General and administrative expenses | |||||||
| Loss from operations | |||||||
| Other income (expense): | |||||||
| California franchise tax | — | — | |||||
| Share-based compensation expense | |||||||
| Earnings from investments held in Trust Account | |||||||
| Total other income, net | |||||||
| Net income | |||||||
| Basic net income (loss) per share | — | — | — | ||||
| Diluted net income (loss) per share | — | — | — | — |