Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
ASSETS
Cash and cash equivalents	$ 7,184	$ 1,443
Accounts receivable, net	239	0
Prepaid expense and other current assets	1,437	1,859
Subscription receivable	3,087	0
Total current assets	11,947	3,302
Other assets	243	340
Furniture and equipment, net	69	9
Right-of-use assets, net	350
Intangible assets, net	1,777	0
Goodwill	610	0
Total assets	14,996	3,651
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Accounts payable	4,257	4,130
Accrued and other current liabilities	9,875	10,149
Accrued clinical site costs	351	379
Convertible note payable and accrued interest, current	9,909	1,246
Insurance loan payable	152	320
Warrant liabilities	15,860	5,639
Total current liabilities	40,593	21,863
Convertible note payable and accrued interest, long term	0	5,011
Total liabilities	40,751	26,874
Commitments and Contingencies (Note 11)
Common Stock, $0.001 par value, 500,000,000 shares authorized; 27,682,530 and 14,591,505 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	28	15
Additional paid-in capital	281,473	255,035
Accumulated deficit	(307,256)	(278,273)
Total stockholders’ deficit	(25,755)	(23,223)
Total liabilities and stockholders' deficit	14,996	3,651
Nondesignated Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Preferred stock	0	0
Series A Convertible Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Preferred stock	0	0
Nonrelated Party [Member]
ASSETS
Right-of-use assets, net	107	0
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Lease liability, short term	87	0
Lease liability, noncurrent	15	0
Related Party [Member]
ASSETS
Right-of-use assets, net	243	0
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Accounts payable	300	100
Lease liability, short term	102	0
Lease liability, noncurrent	$ 143	$ 0