INCOME TAXES - Summary of Tax Effects of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Non-current deferred tax assets:
Net operating loss carryforwards	$ 383,908	$ 368,824
U.S. federal and state tax credits	282	194
Other non-U.S. deferred tax assets	12,775	13,326
Share-based compensation	1,317	1,220
Accrued expenses	1,369	962
Unrealized losses	10,112	10,397
Other	0	334
Depreciation	144	61
Non-current deferred tax liabilities:
Intangible assets	(9,082)	(8,290)
Other non-U.S. deferred tax liability	(420)	(523)
Other	(244)	0
Deferred tax assets net of deferred tax liabilities	400,161	386,505
Valuation allowance	(404,141)	(389,147)
Non-current deferred tax liabilities, net	$ (3,980)	$ (2,642)