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Summary of Major Jurisdictions and Tax Year Subject to Examination Tax Authorities (Detail)	12 Months Ended
	Dec. 31, 2021
China
Income Tax Examination [Line Items]
Years Subject to Income Tax Examination	2018 and onward
HONG KONG
Income Tax Examination [Line Items]
Years Subject to Income Tax Examination	2018 and onward
Taiwan
Income Tax Examination [Line Items]
Years Subject to Income Tax Examination	2016 and onward
United States
Income Tax Examination [Line Items]
Years Subject to Income Tax Examination	2016 onward

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Income Tax Examination, Years Subject to Examination

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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