Note 9 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property and equipment, gross	$ 3,462	$ 3,397
Less: accumulated depreciation	(3,350)	(3,255)
Property and equipment, net	112	142
Leaseholds and Leasehold Improvements [Member]
Property and equipment, gross	327	321
Vehicles [Member]
Property and equipment, gross	785	771
Office Equipment [Member]
Property and equipment, gross	1,379	1,353
Electronic Devices [Member]
Property and equipment, gross	$ 971	$ 952

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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