| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Collaboration revenue - related party | — | — | — | — | ||||||||||||
| YoY growth | — | — | — | — | ||||||||||||
| Operating expenses: | ||||||||||||||||
| Research and development | ||||||||||||||||
| General and administrative | ||||||||||||||||
| Restructuring charges | — | — | — | — | ||||||||||||
| Total operating expenses | ||||||||||||||||
| % of revenue | — | — | — | — | ||||||||||||
| Loss from operations | ||||||||||||||||
| % of revenue | — | — | — | — | ||||||||||||
| Other income, net: | ||||||||||||||||
| Interest income | ||||||||||||||||
| Interest expense | — | — | ||||||||||||||
| Change in fair value of derivative liabilities | ||||||||||||||||
| Other income, net | ||||||||||||||||
| Total other income, net | ||||||||||||||||
| Net loss | ||||||||||||||||
| % of revenue | — | — | — | — | ||||||||||||
| Net loss per share, basic | ||||||||||||||||
| Net loss per share, diluted |