SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Finite-Lived Intangible Assets [Line Items] | |||
| Impairment of intangible assets | $ 0 | $ 0 | |
| Minimum | |||
| Finite-Lived Intangible Assets [Line Items] | |||
| Useful lives | 5 years | ||
| Maximum | |||
| Finite-Lived Intangible Assets [Line Items] | |||
| Useful lives | 10 years | ||
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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. No definition available.
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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