Summary of Significant Accounting Policies - Property, equipment and software (Details) |
Dec. 31, 2025 |
|---|---|
| Computer equipment | Minimum | |
| Property, equipment and software | |
| Estimated useful life | 1 year |
| Computer equipment | Maximum | |
| Property, equipment and software | |
| Estimated useful life | 3 years |
| Office equipment | |
| Property, equipment and software | |
| Estimated useful life | 3 years |
| Purchased software | Minimum | |
| Property, equipment and software | |
| Estimated useful life | 3 years |
| Purchased software | Maximum | |
| Property, equipment and software | |
| Estimated useful life | 5 years |
| Leasehold improvements | |
| Property, equipment and software | |
| Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember |