Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings per share
Profit (loss)	$ (226,905)	$ (183,718)	$ (254,177)
Profit (loss), attributable to non-controlling interests	(40)	(36)	(422)
Profit (loss), attributable to ordinary equity holders of parent entity	$ (226,865)	$ (183,682)	$ (253,755)
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]
Weighted average number of shares for basic EPS	193,835,475	160,697,588	140,655,697
Weighted average number of shares for diluted EPS	193,835,475	160,697,588	140,655,697
Loss per share - basic	$ (1.17)	$ (1.14)	$ (1.80)
Loss per share - diluted	$ (1.17)	$ (1.14)	$ (1.80)
Share options	2,070,033	5,252,152	8,004,121

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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