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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Short-term investments |  |  |
Short-term investments | $ 13,927 | $ 280,251 |
Recurring |  |  |
Short-term investments |  |  |
Short-term investments | 13,927 | 280,251 |
Recurring | Structured Financial Products |  |  |
Short-term investments |  |  |
Short-term investments |  | 269,946 |
Recurring | Wealth Management Products |  |  |
Short-term investments |  |  |
Short-term investments | 13,927 | 10,305 |
Nonrecurring |  |  |
Short-term investments |  |  |
Impairment losses on its long-lived assets | 0 | 0 | $ 0
Level 1 | Recurring |  |  |
Short-term investments |  |  |
Short-term investments |  | 10,305 |
Level 1 | Recurring | Wealth Management Products |  |  |
Short-term investments |  |  |
Short-term investments |  | 10,305 |
Level 2 | Recurring |  |  |
Short-term investments |  |  |
Short-term investments | 13,927 | 269,946 |
Level 2 | Recurring | Structured Financial Products |  |  |
Short-term investments |  |  |
Short-term investments |  | $ 269,946 |
Level 2 | Recurring | Wealth Management Products |  |  |
Short-term investments |  |  |
Short-term investments | $ 13,927 |  |

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