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Cash and Cash Equivalents, As well As Restricted, Cash in Bank Accounts Jurisdictions of Major Financial Institutions (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents and Restricted cash	$ 46,002	$ 58,274
Taiwan
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents and Restricted cash	42,040	52,261
Hong Kong
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents and Restricted cash	3,946	5,997
China
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents and Restricted cash	$ 16	$ 16

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- Definition

Cash and cash equivalents, at carrying value, including restricted cash and discontinued operations.

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No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Details

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- Details

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