Note 2 - Summary of Significant Accounting Policies - Segment Reporting (Details) - USD ($)		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Revenues		$ 143,000	$ 82,000
Cost of revenues		11,000	5,000
Acquired in-process research and development		119,000	0
Professional fees		91,000	150
Research and development expense		103,000	37,000
Interest income		(18,000)	(33,000)
Change in fair value of royalties payable due to related parties		1,163,000	86,000
Income tax benefit		(724,000)	0
Net loss		(4,045,000)	(2,675,000)
Operating Segments [Member]
Revenues		143,000	82,000
Cost of revenues		11,000	5,000
Acquired in-process research and development		119,000	0
Depreciation and amortization expense		531,000	522,000
Stock-based compensation expense		91,000	6,000
Salaries and benefits expense		1,314,000	661,000
Professional fees		727,000	672,000
Research and development expense		103,000	37,000
Interest income		(18,000)	(33,000)
Interest expense		49,000	3,000
Change in fair value of royalties payable due to related parties		1,163,000	86,000
Income tax benefit		(724,000)	0
Other segment items (1)	[1]	822,000	798,000
Net loss		(4,045,000)	(2,675,000)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Net loss		$ 0	$ 0

[1] Other segment items include consulting fees of $91 thousand, investor relations and SEC fees of $257 thousand, insurance fees of $82 thousand, and other selling, general, and administrative expenses of $392 thousand for the three months ended March 31, 2025. Other segment items include other expenses, net of $3 thousand, consulting fees of $149 thousand, investor relations and SEC fees of $136 thousand, insurance fees of $134 thousand, and other selling, general, and administrative expenses of $375 thousand for the three months ended March 31, 2024. Other selling, general, and administrative expenses primarily consist of travel expenses, computer and information technology expenses, and rent expenses.