INCOME TAXES - Summary of Tax Effects of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Non-current deferred tax assets:
Net operating loss carryforwards	$ 481,741	$ 383,908
U.S. federal and state tax credits	228	282
Other non-U.S. deferred tax assets	12,487	12,775
Share-based compensation	1,420	1,317
Accrued expenses	1,931	1,369
Capital loss carryforward	10,046	10,112
Depreciation	8	144
Non-current deferred tax liabilities:
Intangible assets	(9,122)	(9,082)
Other non-U.S. deferred tax liability	(433)	(420)
Other	(415)	(244)
Deferred tax assets net of deferred tax liabilities	497,891	400,161
Valuation allowance	(501,927)	(404,141)
Non-current deferred tax liabilities, net	$ (4,036)	$ (3,980)