Note 2 - Summary of Significant Accounting Policies - Segment Reporting (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023
Revenues		$ 420	$ 442
Cost of revenues		42	30
Loss on impairment of goodwill		0	60,934
Professional fees		505	730
Research and development expenses		272	475
Interest income		(81)	(347)
Change in fair value of royalties payable due to related parties		2,239	(7,208)
Income tax expense		3,141	0
Net loss		(16,643)	(70,572)
Operating Segments [Member]
Revenues		420	442
Cost of revenues		42	30
Loss on impairment of goodwill		0	60,934
Depreciation and amortization expense		2,109	2,075
Stock-based compensation expense		54	1,217
Salaries and benefits expense		4,192	4,661
Professional fees		2,034	5,622
Research and development expenses		272	475
Interest income		(81)	(347)
Interest expense		91	0
Income tax expense		3,141	0
Other segment items (1)	[1]	2,970	3,555
Net loss		(16,643)	(70,572)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Net loss		$ 0	$ 0

[1] Other segment items include other expenses, net of $10 thousand, consulting fees of $505 thousand, investor relations and SEC fees of $459 thousand, insurance fees of $533 thousand, and other selling, general, and administrative expenses of $1,462 thousand for the year ended December 31, 2024. Other segment items include other expenses, net of $8 thousand, consulting fees of $730 thousand, investor relations and SEC fees of $691 thousand, insurance fees of $704 thousand, and other selling, general, and administrative expenses of $1,422 thousand for the year ended December 31, 2023. Other selling, general, and administrative expenses primarily consist of travel expenses, computer and information technology expenses, and rent expenses.