| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Condensed Consolidated Statements of Loss | ||||||||||||||||
| Product revenue, net | — | — | ||||||||||||||
| License and other revenue | ||||||||||||||||
| Total revenues | — | — | ||||||||||||||
| Operating Expenses | ||||||||||||||||
| Cost of product sales | — | — | ||||||||||||||
| Research and development, net of tax credits | ||||||||||||||||
| Selling, general and administrative | — | — | — | |||||||||||||
| Total operating expenses | — | — | ||||||||||||||
| % of revenue | 4685.0% | 10042.4% | — | — | ||||||||||||
| Loss from operations | ||||||||||||||||
| % of revenue | -4585.0% | -9942.4% | — | — | ||||||||||||
| Interest income | ||||||||||||||||
| Interest expense | ||||||||||||||||
| Net loss and comprehensive loss | ||||||||||||||||
| % of revenue | -5118.8% | -10952.1% | — | — | ||||||||||||
| Net loss per share, basic (in dollars per share) | ||||||||||||||||
| Net loss per share, diluted (in dollars per share) |