OTHER (EXPENSE) INCOME, NET Components of Other (Expense) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Interest and investment income	$ 137	$ 46	$ 299	$ 209
Income tax expense	(268)	(171)	(709)	(277)
Other non-operating income	0	0	0	4
Total other (expense) income, net	$ (131)	$ (125)	$ (410)	$ (64)