INCOME TAXES - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Pre-tax loss from continuing operations	$ (146,781)	$ (176,072)
Computed income taxes at statutory rate	(30,824)	(36,975)
State income taxes, net of federal benefit	395	561
Foreign tax rate differential	701	1,380
Non-cash compensation	228	320
Deferred taxes on investment in foreign subsidiaries	0	(1,939)
Non-deductible expenses	118	229
Foreign withholding	693	1,078
Prior year tax adjustments	7	141
Goodwill impairment	0	9,399
Valuation allowance	31,430	34,284
Rate change	0	(140)
Other	558	435
Total expense (benefit) for income tax on continuing operations	$ 3,306	$ 8,773