XML 78 R40.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Organization and Principal Activities - Schedule of Significant Operating Subsidiaries (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017
Zai Lab (Hong Kong) Limited |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | Hong Kong
Date of incorporation | Apr. 29, 2013
Percentage of ownership | 100.00%
Principal activities | Operating company for business development and R&D activities
Zai Lab (Shanghai) Co., Ltd |
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items] |
Place of incorporation | The People's Republic of China ("PRC" or "China")
Date of incorporation | Jan. 06, 2014
Percentage of ownership | 100.00%
Principal activities | Development and commercialisation of innovative medicines
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

X
- 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
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipBusinessPurpose
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition State in which the subsidiary of the limited liability company or limited partnership was organized. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipState
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=zlab_ZaiLabHongKongLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=zlab_ZaiLabShanghaiCompanyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=zlab_ZaiLabAUSTPtyLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=zlab_ZaiLabSuzhouCompanyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=zlab_ZaiBiopharmaceuticalSuzhouCompanyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |