Segment and Geographic Information - Summary of Property, Equipment and Software, Net, and Right-of-use Assets, Net (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total property, equipment and software, net and right-of-use assets, net	$ 7,572	$ 4,775
Taiwan
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total property, equipment and software, net and right-of-use assets, net	3,141	3,515
China
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total property, equipment and software, net and right-of-use assets, net	455	633
United States
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total property, equipment and software, net and right-of-use assets, net	2,884	593
Singapore
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total property, equipment and software, net and right-of-use assets, net	$ 1,092	$ 34