| Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] |
| | | Three Months Ended | | | Six Months Ended | |
| | | March 31, | | | March 31, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Operating expenses: | | | | | | | | | | | | | | | | |
| Research and development | | $ | 3,145,783 | | | | 3,932,102 | | | | 4,489,965 | | | $ | 9,648,932 | |
| General and administrative | | | 4,073,185 | | | | 5,164,433 | | | | 8,153,018 | | | | 10,391,546 | |
| Total operating expenses | | | 7,218,968 | | | | 9,096,535 | | | | 12,642,983 | | | | 20,040,478 | |
| | | | | | | | | | | | | | | | | |
| Other segment items: | | | | | | | | | | | | | | | | |
| Gain on sale of ENTADFI® assets | | | — | | | | 974,303 | | | | — | | | | 1,669,519 | |
| Gain on extinguishment of debt | | | — | | | | — | | | | — | | | | 8,624,778 | |
| Change in fair value of equity securities | | | 3,931,416 | | | | — | | | | 3,811,338 | | | | (349,078 | ) |
| Other income, net | | | 195,002 | | | | 269,839 | | | | 406,516 | | | | 432,963 | |
| Net income (loss) from discontinued operations, net of taxes | | | 351,418 | | | | (49,226 | ) | | | 351,418 | | | | (7,184,670 | ) |
| | | | | | | | | | | | | | | | | |
| Net loss | | $ | (2,741,132 | ) | | | (7,901,619 | ) | | | (8,073,711 | ) | | $ | (16,846,966 | ) |
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