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Organization and principal activities - Schedule of Significant Operating Subsidiaries (Details) | 6 Months Ended
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Jun. 30, 2020
Zai Lab (Hong Kong) Limited |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | Hong Kong S.A.R
Date of incorporation | Apr. 29, 2013
Percentage of ownership | 100.00%
Principal activities | Operating company for business development and R&D activities and commercialisation of innovative medicines and device
Zai Lab (Shanghai) Co., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | PRC
Date of incorporation | Jan. 06, 2014
Percentage of ownership | 100.00%
Principal activities | Development and commercialisation of innovative medicines and devices
Zai Lab (AUST) Pty., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | Australia
Date of incorporation | Dec. 10, 2014
Percentage of ownership | 100.00%
Principal activities | Clinical trial activities
Zai Lab (Suzhou) Co., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | PRC
Date of incorporation | Nov. 30, 2015
Percentage of ownership | 100.00%
Principal activities | Development and commercialisation of innovative medicines
Zai Biopharmaceutical (Suzhou) Co., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | PRC
Date of incorporation | Jun. 15, 2017
Percentage of ownership | 100.00%
Principal activities | Development and commercialisation of innovative medicines
Zai Lab (US) LLC |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | U.S.
Date of incorporation | Apr. 21, 2017
Percentage of ownership | 100.00%
Principal activities | Operating company for business development and R&D activities
Zai Lab International Trading (Shanghai) Co., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | PRC
Date of incorporation | Nov. 06, 2019
Percentage of ownership | 100.00%
Principal activities | Commercialisation of innovative medicines and devices

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- Definition Description of business purpose of the subsidiary of the limited liability company or limited partnership, for example, its day-to-day operating functions and whether it acts as a holding or operating company. + References No definition available. + Details
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- Definition Date the subsidiary of the limited liability company (LLC) or limited partnership (LP) was formed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010 + Details
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