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ORGANIZATION AND PRINCIPAL ACTIVITIES - EBITDA (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Liabilities waived by Renren Inc. | $ 76,007 | $ (4,213) | $ 76,007
Contribution from Renren Inc for contingent consideration | $ 42,542 |  | $ 42,542
Renren Inc. |  |  |
Earn out shares issued held in escrow | 19,500,000 | 19,500,000 |
Earnout Shares | 19,500,000 |  |
Business combination, contingent consideration arrangements, description |  | $13.00 for any sixty days in any period of ninety consecutive trading days during a fifteen-month period following the closing, and will receive all the 19.5 million Earnout Shares if the stock price of KAH is higher than $13.50 for any sixty days in any period of ninety consecutive trading days during a thirty-month period following the closing |
Renren Inc. | Gross revenue more than or equal 5000 millions |  |  |
Number of ordinary shares entitled from earn out shares | 1,950,000,000,000 |  |
Renren Inc. | Adjusted EBITDA is greater than or equal to RMB150 million |  |  |
Number of ordinary shares entitled from earn out shares | 3,900,000,000,000 |  |
Renren Inc. | Adjusted EBITDA is greater than or equal to RMB200 million |  |  |
Number of ordinary shares entitled from earn out shares | 7,800,000,000,000 |  |
Renren Inc. | Adjusted EBITDA is greater than or equal to RMB340 million |  |  |
Number of ordinary shares entitled from earn out shares | 4,875,000,000,000 |  |
Renren Inc. | Adjusted EBITDA is greater than or equal to RMB480 million |  |  |
Number of ordinary shares entitled from earn out shares | 9,750,000,000,000 |  |

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