Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Ordinary Shares	Additional paid in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2021		955,363,980
Beginning balance at Dec. 31, 2021	$ 1,379,956	$ 6	$ 2,825,948	$ (1,418,074)	$ (23,645)	$ (4,279)
Beginning balance (in shares) at Dec. 31, 2021						(382,930)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of ordinary shares upon vesting of restricted shares (in shares)		514,800
Issuance of ordinary shares upon vesting of restricted shares	0	$ 0	0
Exercise of shares options (in shares)		1,156,660
Exercise of shares options	297	$ 0	297
Receipt of employees’ shares to satisfy tax withholding obligations related to share-based compensation (in shares)						(15,150)
Receipt of employees’ shares to satisfy tax withholding obligations related to share-based compensation	(68)					$ (68)
Share-based compensation	12,410		12,410
Net loss	(82,394)			(82,394)
Foreign currency translation	(2,193)				(2,193)
Ending balance (in shares) at Mar. 31, 2022		957,035,440
Ending balance at Mar. 31, 2022	$ 1,308,008	$ 6	2,838,655	(1,500,468)	(25,838)	$ (4,347)
Ending balance (in shares) at Mar. 31, 2022						(398,080)
Beginning balance (in shares) at Dec. 31, 2022	960,219,570	962,455,850
Beginning balance at Dec. 31, 2022	$ 1,045,595	$ 6	2,893,120	(1,861,360)	25,685	$ (11,856)
Beginning balance (in shares) at Dec. 31, 2022	(2,236,280)					(2,236,280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of ordinary shares upon vesting of restricted shares (in shares)		732,040
Issuance of ordinary shares upon vesting of restricted shares	$ 0	$ 0	0
Exercise of shares options (in shares)		4,009,460
Exercise of shares options	1,673	$ 0	1,673
Receipt of employees’ shares to satisfy tax withholding obligations related to share-based compensation (in shares)						(1,272,330)
Receipt of employees’ shares to satisfy tax withholding obligations related to share-based compensation	(5,130)					$ (5,130)
Share-based compensation	16,661		16,661
Net loss	(49,144)			(49,144)
Foreign currency translation	$ (8,413)				(8,413)
Ending balance (in shares) at Mar. 31, 2023	963,688,740	967,197,350
Ending balance at Mar. 31, 2023	$ 1,001,242	$ 6	$ 2,911,454	$ (1,910,504)	$ 17,272	$ (16,986)
Ending balance (in shares) at Mar. 31, 2023	(3,508,610)					(3,508,610)