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Note 5 - Significant Agreements and Contracts (Details Textual) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 29, 2024 USN ($) | Aug. 31, 2014 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jan. 31, 2023 USD ($) | Jan. 01, 2023 USN ($)
Research and Development Expense |  |  | $ 3,772,391 | $ 1,958,388 | $ 6,586,649 | $ 3,791,662 |  |  |  |
Revenues |  |  | 3,288,971 | 1,719,944 | 5,636,221 | 3,127,812 |  |  |  |
Vertex Option and License Agreement [Member] |  |  |  |  |  |  |  |  |  |
Research and Development Expense |  | $ 100,000 |  |  |  |  |  |  |  |
Contractual Obligation |  |  | 117,000,000 |  | 117,000,000 |  |  |  |  |
Payments for License Agreement |  | $ 100,000 |  |  |  |  |  |  |  |
National Institute of Aging Grant [Member] |  |  |  |  |  |  |  |  |  |
Government Assistance, Asset |  |  |  |  |  |  |  |  | $ 21,000,000 | $ 21.0
Government Assistance, Income, Increase (Decrease) | $ 7.3 |  |  |  | 6,700,000 |  |  |  |  |
Revenues |  |  | 3,300,000 | $ 1,700,000 | 5,600,000 | $ 3,100,000 |  |  |  |
Proceeds From Grants |  |  |  |  | 14,200,000 |  |  |  |  |
Grant Funding Remaining |  |  | $ 6,800,000 |  | $ 6,800,000 |  |  |  |  |
Grant Amount, Received, Parentage | 90.00% |  | 10.00% |  |  |  |  |  |  |
National Institute of Aging Grant [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |
Government Assistance, Income, Increase (Decrease) |  |  |  |  |  |  | $ 6,200,000 | $ 8,100,000 |  |

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