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The Company and its Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Amount of cash insured	$ 3,900	$ 5,000
China
Cash and Cash Equivalents [Line Items]
Cash uninsured	1,200	1,000
Singapore
Cash and Cash Equivalents [Line Items]
Cash uninsured	149	232
Hong Kong
Cash and Cash Equivalents [Line Items]
Cash uninsured	$ 386	$ 351

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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.

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- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

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- Definition

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

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