CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Ordinary Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit	Total
Balances at Dec. 31, 2021	$ 1	$ 1,387,469		$ (1,726,043)	$ (338,573)
Balances (in shares) at Dec. 31, 2021	74,435
Increase (Decrease) in Stockholders' Equity
Employee share-based compensation expense		14,545			14,545
Issuance of restricted shares (in shares)	1,796
Repurchase of shares to satisfy tax withholding		(1,448)			(1,448)
Repurchase of shares to satisfy tax withholding (in shares)	(150)
Net unrealized gain (loss) on marketable securities			$ (28)		(28)
Net loss				(25,946)	(25,946)
Balances at Mar. 31, 2022	$ 1	1,400,566	(28)	(1,751,989)	(351,450)
Balances (in shares) at Mar. 31, 2022	76,081
Balances at Dec. 31, 2022	$ 1	1,295,725	(15)	(853,911)	$ 441,800
Balances (in shares) at Dec. 31, 2022	65,227				65,227
Increase (Decrease) in Stockholders' Equity
Repurchase of ordinary shares, net of transaction costs		(55,353)			$ (55,353)
Repurchase of ordinary shares, net of transaction costs (in shares)	(5,158)				(5,200)
Employee share-based compensation expense		7,021			$ 7,021
Issuance of restricted shares (in shares)	557
Repurchase of shares to satisfy tax withholding		(887)			(887)
Repurchase of shares to satisfy tax withholding (in shares)	(84)
Net unrealized gain (loss) on marketable securities			66		66
Net loss				(22,088)	(22,088)
Balances at Mar. 31, 2023	$ 1	$ 1,246,506	$ 51	$ (875,999)	$ 370,559
Balances (in shares) at Mar. 31, 2023	60,542				60,542