Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Total property and equipment–at cost	$ 7,165	$ 7,165
Less: Accumulated depreciation	(6,421)	(6,267)
Property and equipment, net	744	898
Equipment [Member]
Total property and equipment–at cost	5,167	5,167
Leasehold Improvements [Member]
Total property and equipment–at cost	1,612	1,612
Software Development [Member]
Total property and equipment–at cost	364	364
Furniture and Fixtures [Member]
Total property and equipment–at cost	$ 22	$ 22