Note 3 - Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment, Gross	$ 4,114	$ 4,103
Less: Accumulated depreciation and amortization	(2,840)	(2,699)
Accumulated impairment loss	(1,004)	(1,004)
Property and equipment, net	270	400
Equipment and Furniture [Member]
Property, Plant and Equipment, Gross	1,441	1,430
Buildings, Leasehold, and Building Improvements [Member]
Property, Plant and Equipment, Gross	$ 2,673	$ 2,673

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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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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