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Organization and Principal Activities (Tables) | 12 Months Ended
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Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Schedule of Significant Operating Subsidiaries | As of December 31, 2017, the Group's significant operating subsidiaries are as follows:
Name of company |  | Place of incorporation |  | Date of incorporation |  | Percentage of ownership |  | Principal activities
Zai Lab (Hong Kong) Limited |  | Hong Kong |  | April 29, 2013 |  | 100% |  | Operating company for business development and R&D activities
Zai Lab (Shanghai) Co., Ltd. |  | The People's Republic of China ("PRC" or "China") |  | January 6, 2014 |  | 100% |  | Development and commercialisation of innovative medicines
Zai Lab (AUST) Pty., Ltd. |  | Australia |  | December 10, 2014 |  | 100% |  | Clinical trial activities
Zai Lab (Suzhou) Co., Ltd. |  | PRC |  | November 30, 2015 |  | 100% |  | Development and commercialisation of innovative medicines
Zai Biopharmaceutical (Suzhou) Co., Ltd. |  | PRC |  | June 15, 2017 |  | 100% |  | Development and commercialisation of innovative medicines

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- Definition Tabular disclosure of the key aspects of a subsidiary (partnership, corporation, or other entity) of the limited liability company or limited partnership. + References No definition available. + Details
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