FAIR VALUE MEASUREMENTS - Schedule of fair value of impaired notes receivable (Details) - USD ($) $ in Thousands |
Sep. 30, 2021 |
Dec. 31, 2020 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Marketable securities | $ 29,961 | $ 0 |
| Fair Value, Inputs, Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Cash equivalents | 63,035 | 177,912 |
| Marketable securities | 29,961 | 0 |
| Fair Value, Inputs, Level 3 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Notes receivable impaired | $ 0 | $ 875 |
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- Definition It represents of fair value disclosure notes receivable impaired. No definition available.
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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