XML 67 R48.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Short-term Borrowings - Additional Information (Details)
9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 12, 2018
USD ($)
Dec. 12, 2018
CNY (¥)
Jun. 25, 2018
USD ($)
Jun. 25, 2018
CNY (¥)
Zai Lab (Suzhou) Co., Ltd                
Line Of Credit Facility [Line Items]                
Facility agreement expiration period 3 years              
Facility agreement amount             $ 3,642,616 ¥ 25,000,000
Facility agreement, Outstanding amount $ 2,827,694 ¥ 20,000,000 $ 2,914,093 ¥ 20,000,000        
Facility agreement, Period due 1 year              
Short-term borrowing, average interest rate 4.785%              
Zai Biopharmaceutical (Suzhou) Co., Ltd                
Line Of Credit Facility [Line Items]                
Facility agreement expiration period 3 years              
Facility agreement amount         $ 5,828,185 ¥ 40,000,000    
Facility agreement, Outstanding amount $ 3,534,618 ¥ 25,000,000 $ 728,523 ¥ 5,000,000        
Facility agreement, Period due 1 year              
Short-term borrowing, average interest rate 4.785%