GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Goodwill [Roll Forward]
Carrying amount, December 31, 2017			$ 26,687
Foreign currency adjustments			(5)
Carrying amount, September 30, 2018	$ 26,682		26,682
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3,309		3,309		$ 3,309
Accumulated amortization	(1,642)		(1,642)		(1,351)
Net carrying amount	1,667		1,667		1,958
Amortization expense	97	$ 97	291	$ 291
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2018 (remaining)	97		97
2019	388		388
2020	388		388
2021	384		384
2022	378		378
Thereafter	32		32
Net carrying amount	$ 1,667		$ 1,667		$ 1,958