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INCOME TAXES - Additional Information (Detail) - CNY (¥) | 12 Months Ended | 36 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |  |
Income tax rate | 25.00% | 25.00% | 25.00% |
Valuation allowances | ¥ 1,909,000 | ¥ 619,533,000 |  | ¥ 1,909,000
Tax loss carry-forward | ¥ 54,380,000 | ¥ 2,307,241,000 | ¥ 2,076,261,000 | ¥ 54,380,000
Tax loss carry-forward, limitations on use | The Company operates its business through its subsidiaries and VIEs. The Company does not file consolidated tax returns, therefore, losses from individual subsidiaries or the VIEs may not be used to offset other subsidiaries' or VIEs' earnings within the Company. |  |  |
Tax loss carry-forward, expiration date | Dec. 31, 2023 | Dec. 31, 2022 |  |
Foreign investment enterprises, withholding income tax rate | 10.00% |  |  |
Foreign investment enterprises, withholding income tax rate for those who qualifies as a beneficial owner | 5.00% |  |  |
Foreign investment enterprises, threshold of beneficial ownership to qualify for reduction in withholding income tax rate | 25.00% |  |  |
Foreign investment enterprises, withholding income tax rate for those who do not qualify as a beneficial owner | 10.00% |  |  |
Shanghai Niwodai Internet Finance Information Services Co., Ltd. |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax rate |  |  |  | 15.00%
PRC |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax rate | 25.00% |  |  |
Preferential tax rate | 15.00% |  |  |
Statute of limitations period (in years) |  | 3 years |  |
Extension period for statute of limitations under special circumstances (in years) |  | 5 years |  |
Amount of underpayment threshold of tax liability listed as special circumstance | ¥ 100,000 |  |  | ¥ 100,000
Statute of limitations period for related party transaction (in years) |  | 10 years |  |
Statute of limitations period for tax evasion (in years) |  | 0 years |  |
Hong Kong |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax rate | 16.50% |  |  |

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