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The Company and Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Jun. 30, 2023 | Jan. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | May 31, 2022 | Apr. 30, 2022
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Proceeds from short-term bank loans |  |  |  | $ 56,470 | $ 53,078 | $ 20,543 |  |
Restricted cash | $ 12,362 |  |  | 12,362 | 6,400 |  |  |
Bank Of Beijing |  |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 3,400 |
Secured debt | Bank Of Beijing |  |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Time deposit |  |  |  |  | $ 2,500 |  | $ 1,000 | $ 2,900
Proceeds from short-term bank loans |  |  | $ 2,300 |  |  |  |  |
Secured debt | Bank Of China |  |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Time deposit |  |  | 3,000 |  |  |  |  |
Proceeds from short-term bank loans |  |  | $ 2,900 |  |  |  |  |
Secured debt | June 2023 Bank Loan Two |  |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Time deposit | 3,900 |  |  | 3,900 |  |  |  |
Proceeds from short-term bank loans |  |  |  | 3,500 |  |  |  |
Secured debt | June 2023 Bank Loan One |  |  |  |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |  |  |  |
Time deposit | 1,500 | $ 1,500 |  | $ 1,500 |  |  |  |
Proceeds from short-term bank loans | $ 1,400 | $ 1,400 |  |  |  |  |  |

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