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
|