INCOME TAXES - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Computed at statutory rate	$ (13,944)	$ (4,065)
State taxes, net of federal benefit	(1,901)	(641)
Permanent items and other	992	341
Credit carryforwards	2,014	(478)
Foreign income taxed at different rates	22	0
Goodwill impairment	3,907	0
Change in tax carryforwards not benefitted	(352)	5,778
Change in valuation allowance	(14,849)	(8,917)
Income tax expense (benefit)	$ (24,111)	$ (7,982)