Employee Benefit Plans - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Mainland China Contribution Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions for employee benefits	$ 1,800,000	$ 1,700,000	$ 3,300,000	$ 3,400,000
Defined-Contribution Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions for employee benefits	$ 36,100	$ 40,000	$ 70,800	$ 70,800

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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+ Details

- 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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