Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Total property and equipment–at cost	$ 7,021	$ 7,269
Less: Accumulated depreciation	(5,171)	(5,026)
Property and equipment, net	1,850	2,243
Equipment [Member]
Total property and equipment–at cost	5,027	5,351
Leasehold Improvements [Member]
Total property and equipment–at cost	1,607	1,531
Software Development [Member]
Total property and equipment–at cost	365	365
Furniture and Fixtures [Member]
Total property and equipment–at cost	$ 22	$ 22