Significant Accounting Policies - Property and equipment (Details) |
Dec. 31, 2025 |
|---|---|
| Significant Accounting Policies | |
| Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember |
| Electronic equipment | |
| Significant Accounting Policies | |
| Property, Plant and Equipment, Useful Life | 3 years |
| Office equipment and furniture | Minimum | |
| Significant Accounting Policies | |
| Property, Plant and Equipment, Useful Life | 3 years |
| Office equipment and furniture | Maximum | |
| Significant Accounting Policies | |
| Property, Plant and Equipment, Useful Life | 5 years |