INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Current:
Federal	$ 31	$ 51	$ 68	$ 70
State and local	83	43	251	108
Foreign	252	108	322	160
Total current provision	366	202	641	338
Deferred:
Federal	(597)	(1,863)	(878)	(1,760)
State and local	0	(668)	0	(639)
Foreign	(3,519)	1	(3,611)	0
Total deferred provision	(4,116)	(2,530)	(4,489)	(2,399)
Continuing operations	(3,750)	(2,328)	(3,848)	(2,061)
Discontinued operations	0	29	0	215
Total	$ (3,750)	$ (2,299)	$ (3,848)	$ (1,846)