| Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] |
| | | Three Months Ended | | | Nine Months Ended | |
| | | June 30, | | | June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Operating expenses: | | | | | | | | | | | | | | | | |
| Research and development | | $ | 4,352,668 | | | $ | 3,020,563 | | | $ | 8,842,633 | | | $ | 12,669,495 | |
| General and administrative | | | 3,361,013 | | | | 5,010,528 | | | | 11,514,031 | | | | 15,402,074 | |
| Total operating expenses | | | 7,713,681 | | | | 8,031,091 | | | | 20,356,664 | | | | 28,071,569 | |
| | | | | | | | | | | | | | | | | |
| Other segment items: | | | | | | | | | | | | | | | | |
| Gain on sale of ENTADFI® assets | | | — | | | | 484,615 | | | | — | | | | 2,154,134 | |
| Gain on extinguishment of debt | | | — | | | | — | | | | — | | | | 8,624,778 | |
| Change in fair value of equity securities | | | 546,129 | | | | — | | | | 4,357,467 | | | | (349,078 | ) |
| Other income, net | | | 179,202 | | | | 223,375 | | | | 585,718 | | | | 656,338 | |
| Net (loss) income from discontinued operations, net of taxes | | | — | | | | (9,719 | ) | | | 351,418 | | | | (7,194,389 | ) |
| | | | | | | | | | | | | | | | | |
| Net loss | | $ | (6,988,350 | ) | | $ | (7,332,820 | ) | | $ | (15,062,061 | ) | | $ | (24,179,786 | ) |
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