Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net loss	$ (41,671)	$ (80,277)	$ (53,471)	$ (69,152)	$ (120,895)	$ (49,144)	$ (175,419)	$ (239,191)
Denominator:
Weighted average number of ordinary shares - basic (in shares)	981,687,390			968,767,730			976,941,030	965,060,570
Weighted average number of ordinary shares - diluted (in shares)	981,687,390			968,767,730			976,941,030	965,060,570
Net loss per share - basic (in dollars per share)	$ (0.04)			$ (0.07)			$ (0.18)	$ (0.25)
Net loss per share - diluted (in dollars per share)	$ (0.04)			$ (0.07)			$ (0.18)	$ (0.25)