Quarterly report pursuant to Section 13 or 15(d)

Loss per share - Antidilutive securities (Details)

v3.19.1
Loss per share - Antidilutive securities (Details) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share options    
Antidilutive securities    
Potentially dilutive equity instruments excluded from the diluted loss per share (in shares) 103,848,778 89,203,915