Note 9 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property and equipment, cost	$ 2,116	$ 2,119
Less: accumulated depreciation	(1,929)	(1,904)
Property and equipment, net	187	215
Vehicles [Member]
Property and equipment, cost	519	520
Office Equipment [Member]
Property and equipment, cost	845	846
Electronic Devices [Member]
Property and equipment, cost	570	571
Leasehold Improvements [Member]
Property and equipment, cost	$ 182	$ 182