| Line Item | Jun 30, 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 |
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| Operating expenses: | |||||||||||||||
| Research and development | |||||||||||||||
| General and administrative | |||||||||||||||
| Total operating expenses | |||||||||||||||
| Loss from operations | |||||||||||||||
| Interest income | |||||||||||||||
| Other expense | — | — | |||||||||||||
| Net loss attributable to common stockholders | |||||||||||||||
| Net loss per share attributable to common stockholders, basic | |||||||||||||||
| Net loss per share attributable to common stockholders, diluted |