Note 9 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property and equipment, gross	$ 2,708	$ 2,320
Less: accumulated depreciation	(2,333)	(2,260)
Property and equipment, net *	375	60
Vehicles [Member]
Property and equipment, gross	933	811
Office Equipment [Member]
Property and equipment, gross	944	894
Electronic Devices [Member]
Property and equipment, gross	629	615
Leasehold Improvements [Member]
Property and equipment, gross	$ 202	$ 0

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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