Note 5 - Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Total property, plant and equipment	$ 1,487	$ 1,487
Less: accumulated depreciation	(1,476)	(1,462)
Property, plant and equipment, net	11	25
Leasehold Improvements [Member]
Total property, plant and equipment	35	35
Furniture, Machinery, and Equipment [Member]
Total property, plant and equipment	1,414	1,414
Computer Equipment [Member]
Total property, plant and equipment	$ 38	$ 38