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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