Note 9 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property and equipment, gross	$ 2,980	$ 3,026
Less: accumulated depreciation	(2,905)	(2,948)
Property and equipment, net	75	78
Vehicles [Member]
Property and equipment, gross	747	758
Office Equipment [Member]
Property and equipment, gross	1,310	1,331
Electronic Devices [Member]
Property and equipment, gross	$ 923	$ 937

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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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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