INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Current:
Federal	$ 195	$ 143	$ 316	$ 162
State and local	(5)	9	48	40
Foreign	20	15	41	26
Total current provision	210	167	405	228
Deferred:
Federal	44	(4)	48	1
State and local	0	1	0	1
Foreign	210	14	223	(118)
Total deferred provision	254	11	271	(116)
Total provision for income taxes	$ 464	$ 178	$ 676	$ 112