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Organization and Principal Activities | 12 Months Ended
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Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Organization and Principal Activities |
1. | Organization and principal activities
Zai Lab Limited (the “Company”) was incorporated on March 28, 2013 in the Cayman Islands as an exempted company with limited liability under the Companies Law of the Cayman Islands. The Company and its subsidiaries (collectively referred to as the “Group”) are principally engaged in discovering or licensing, developing and commercializing proprietary therapeutics that address areas of large unmet medical needs in the China market, including in the fields of oncology, autoimmune and infectious disease therapies. 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 The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -URI http://asc.fasb.org/topic&trid=2122149 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -URI http://asc.fasb.org/topic&trid=2197479 + Details
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