SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intangible assets, net & Impairment of long-lived assets other than goodwill (Details) - USD ($) |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Intangible assets, net (other than goodwill) | |||
| Impairment loss | $ 0 | $ 0 | $ 0 |
| Minimum | |||
| Intangible assets, net (other than goodwill) | |||
| Useful life | 5 years | ||
| Maximum | |||
| Intangible assets, net (other than goodwill) | |||
| Useful life | 6 years | ||
| Patent | |||
| Intangible assets, net (other than goodwill) | |||
| Useful life | 6 years | ||
| Software | |||
| Intangible assets, net (other than goodwill) | |||
| Useful life | 5 years | ||
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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