INCOME TAXES - Change in Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowance [Roll Forward]
Beginning balance	$ (85,991)	$ (70,231)	$ (67,463)
Allowance for domestic and foreign net operating loss carry-forwards	(51,856)	(26,277)	(3,598)
Rate change on domestic net operating loss carry-forwards	419	(82)	(32)
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount	0	12,642	0
Other changes	13,561	(2,043)	862
Ending balance	$ (123,867)	$ (85,991)	$ (70,231)