Business Segment, Geographic, and Concentration Risk Information - Summary of Property and Equipment by Geographical Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Total property and equipment, net:
Total consolidated property and equipment, net	$ 41,778	$ 34,388
United States
Total property and equipment, net:
Total consolidated property and equipment, net	20,902	15,511
China
Total property and equipment, net:
Total consolidated property and equipment, net	$ 20,876	$ 18,877

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant