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Principal Activities and Reorganization - Additional Information (Detail) |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 20, 2017 $ / shares | Dec. 31, 2019 $ / shares | Jun. 30, 2012 $ / shares
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Date of incorporation |  | Jun. 06, 2012 |
Place of incorporation |  | Cayman Islands |
Share split, description |  | Each of ordinary share and preferred share of the Company was subdivided into 100 shares at a par value of US$0.00001 |
Preferred stock shares converted and designated | 100 |  |
Ordinary shares, par value | $ 0.00001 | $ 0.00001 | $ 0.00001
Preferred shares, par value | $ 0.00001 |  |

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