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RELATED PARTY BALANCES AND TRANSACTIONS (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Related Party Transaction [Line Items] |  |
Amounts due to related parties | $ 2,960 | $ 4,214
Renren And Its Subsidiaries [Member] |  |
Related Party Transaction [Line Items] |  |
Amounts due to related parties | 2,255 |
Ningbo Jiusheng Automobile Sales Co., Ltd. |  |
Related Party Transaction [Line Items] |  |
Amounts due to related parties | $ 705 |
SVF |  |
Related Party Transaction [Line Items] |  |
Amounts due to related parties |  | $ 4,214

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