SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill, Lease, Long-term investments and Equity method investment (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Equity Securities without Readily Determinable Fair Value [Line Items] | |||
| Impairment of goodwill | $ 0 | $ 0 | $ 0 |
| Impairment loss on equity securities without readily determinable fair values | 200,237 | 0 | 0 |
| Credit-related impairment losses on available-for-sale securities | 0 | 0 | 0 |
| Impairment losses on its equity method investment | $ 0 | $ 0 | $ 0 |
| Maximum | |||
| Equity Securities without Readily Determinable Fair Value [Line Items] | |||
| Remaining lease terms (in years) | 3 years | ||
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- Definition Credit-related impairment losses on its available‑for‑sale securities. No definition available.
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| X | ||||||||||
- Definition Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- 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/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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