SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventories and Property and Equipment, net (Details) |
Dec. 31, 2025 |
|---|---|
| Furniture, fixtures and office equipment | Minimum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 1 year |
| Furniture, fixtures and office equipment | Maximum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 5 years |
| Leasehold improvements | |
| PROPERTY AND EQUIPMENT, NET | |
| Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember |
| Vehicles | Minimum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 4 years |
| Vehicles | Maximum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 10 years |
| IT equipment | Minimum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 1 year |
| IT equipment | Maximum | |
| PROPERTY AND EQUIPMENT, NET | |
| Useful lives | 3 years |