SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Long-lived assets (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | ||||
| Intangible assets, useful life | 10 years | 10 years | ||
| Impairment loss measurement | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |