Note 16 - Segments - Significant Expense Categories (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| 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 | ||||
| Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal | 0 | 484,615 | 0 | 2,154,134 | ||||
| Gain (Loss) on Extinguishment of Debt | 0 | 0 | 0 | 8,624,778 | ||||
| Net gains (losses) recognized during the period on equity securities | 546,129 | 0 | 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 | 0 | (9,719) | 351,418 | (7,194,389) | ||||
| Net loss | $ (6,988,350) | $ (2,741,132) | $ (5,332,579) | $ (7,332,820) | $ (7,901,619) | $ (8,945,347) | $ (15,062,061) | $ (24,179,786) |
| X | ||||||||||
- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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