Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Loss per share (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Loss per share (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerator for basic and diluted income (loss) per share      
Net loss $ (95,514) $ (70,138) $ (71,579)
Net loss attributable to ordinary shareholders $ (95,514) $ (70,138) $ (71,579)
Denominator for basic and diluted income (loss) per share      
Weighted average number of shares used to calculate basic and diluted loss per share (in shares) 584,338,942 527,637,086 424,713,997