Note 7 - Commitments and Contingencies (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
	Sep. 30, 2023	Mar. 31, 2025	Mar. 31, 2024
Operating Lease, Monthly Rent Payment	$ 4,700
Operating Lease, Rent Expense, Annual Increase In Rent, Percent	2.00%
Sublease Income		$ 12,000	$ 12,000
Operating Lease, Payments		39,000	29,000
Research and Development Expense		3,435,000	4,252,000
Houston Pharmaceuticals, Inc [Member]
Costs and Expenses, Related Party		59,000	59,000
MD Anderson [Member]
License Agreements Expense		50,000	54,000
Research and Development Expense		$ 261,000	$ 156,000