Note 7 - Commitments and Contingencies (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Lease, Monthly Rent Payment	$ 4,700		$ 4,700		$ 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		39,000	34,000	107,000	109,000
License Agreements Expense		767,000	221,000	1,300,000	552,000
Houston Pharmaceuticals, Inc [Member]
Related Party Transaction, Amounts of Transaction		59,000	59,000	176,000	176,000
MD Anderson [Member]
License Agreements Expense		$ 63,000	$ 64,000	$ 180,000	$ 193,000