Business Segment, Geographic, and Concentration Risk Information - Summary of Property and Equipment by Geographical Segment (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Total property and equipment, net:
Total consolidated property and equipment, net	$ 4,194	$ 5,181
United States
Total property and equipment, net:
Total consolidated property and equipment, net	3,757	4,196
China
Total property and equipment, net:
Total consolidated property and equipment, net	$ 437	$ 985

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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