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