Note 7 - Commitments and Contingencies (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 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	$ 37,000	$ 37,000
Operating Lease, Payments		40,000	39,000	119,000	107,000
Research and Development Expense		3,738,000	4,932,000	10,774,000	13,274,000
Houston Pharmaceuticals, Inc [Member]
Costs and Expenses, Related Party		15,000	15,000	45,000	176,000
MD Anderson [Member]
License Agreements Expense		32,000	63,000	115,000	180,000
Research and Development Expense		$ 11,000	$ 767,000	$ 324,000	$ 1,300,000