Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Antidilutive Securities (Details)

v3.20.4
Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share options      
Antidilutive securities      
Weighted average number of share options (in shares) 93,812,818 96,675,101 88,553,474