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LONG-TERM INVESTMENTS - Additional Information (Detail) ¥ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 29, 2020 CNY (¥) | Sep. 29, 2020 USD ($) | Jan. 31, 2020 CNY (¥) | May 31, 2019 CNY (¥) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2020 USD ($) | Sep. 29, 2020 USD ($) | Mar. 13, 2020 shares
Long Term Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Income (loss) from investment in affiliates |  |  |  |  | ¥ (7,509) | $ (1,151,000) | ¥ 378 |  |  |
Long-term investment |  |  |  |  | 87,551 |  | 3,826 | $ 13,418,000 |  |
Keen Best |  |  |  |  |  |  |  |  |  |
Long Term Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares acquired | shares |  |  |  |  |  |  |  |  |  | 35
Equity Percent Acquired |  |  |  |  |  |  |  |  |  | 35.00%
Purchase price for shares | ¥ 91,957 | $ 13,544,000 |  |  |  |  |  |  |  |
Goodwill | ¥ 1,508 |  |  |  |  |  |  |  | $ 231,000 |
Income (loss) from investment in affiliates |  |  |  |  | 822 | 126,000 |  |  |  |
Impairment on investment | $ |  |  |  |  |  | $ 0 |  |  |  |
SG Fintech Joint Stock Company |  |  |  |  |  |  |  |  |  |
Long Term Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Equity Percent Acquired |  |  | 24.10% | 24.90% |  |  |  |  |  |
Income (loss) from investment in affiliates |  |  |  |  | 6,687 |  |  |  |  |
Impairment on investment |  |  |  |  | ¥ 49 |  |  |  |  |
Investment income, net |  |  |  |  |  |  | ¥ 378 |  |  |
Cash consideration |  |  | ¥ 3,378 | ¥ 3,400 |  |  |  |  |  |

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