| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Revenue | — | — | — | |||||||||||||
| Operating expenses | ||||||||||||||||
| Cost of sales | — | — | — | |||||||||||||
| Research and development | ||||||||||||||||
| General and administrative | ||||||||||||||||
| Total operating expenses | ||||||||||||||||
| % of revenue | 6148.8% | — | — | — | ||||||||||||
| Loss from operations | ||||||||||||||||
| % of revenue | -6048.8% | — | — | — | ||||||||||||
| Other income (expense) | ||||||||||||||||
| Interest and dividend income, net | ||||||||||||||||
| Other non-operating expenses | — | — | — | |||||||||||||
| Total other income (expense) | — | |||||||||||||||
| Loss before income taxes | ||||||||||||||||
| Income tax benefit (expense) | ||||||||||||||||
| Net loss | ||||||||||||||||
| % of revenue | -4011.2% | — | — | — | ||||||||||||
| Basic - Class A common stock (in dollars per share) | ||||||||||||||||
| Diluted - Class A common stock (in dollars per share) |