Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Total property and equipment–at cost	$ 7,156	$ 7,135
Less: Accumulated depreciation	(6,105)	(5,568)
Property and equipment, net	1,051	1,567
Equipment [Member]
Total property and equipment–at cost	5,158	5,137
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