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SEGMENT REPORTING - Schedule of Long-lived Assets, Consisting of Property, Plant and Equipment, by Geographical Area (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
SEGMENT REPORTING
Long-lived assets	$ 602	$ 620
China
SEGMENT REPORTING
Long-lived assets	528	565
Other
SEGMENT REPORTING
Long-lived assets	$ 74	$ 55

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- Definition

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