GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Change in carrying amount of goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 17,471
Foreign currency translation adjustment	117
Goodwill, Ending Balance	17,588
Other intangible assets, net [Abstract]
Intangible assets, net			$ 5,127	$ 5,254
Goodwill	17,471		17,588	17,471
Amortization expense	256	$ 286
Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2018			803
2019			902
2020			858
2021			783
2022			464
Total			3,810
IT [Member]
Change in carrying amount of goodwill [Roll Forward]
Goodwill, Ending Balance	14,375
Other intangible assets, net [Abstract]
Goodwill	14,375		14,375
Equipment [Member]
Change in carrying amount of goodwill [Roll Forward]
Goodwill, Ending Balance	3,213
Other intangible assets, net [Abstract]
Goodwill	$ 3,213		3,213
Customer-Related [Member]
Other intangible assets, net [Abstract]
Costs			5,831	5,831
Accumulated amortization			(2,656)	(2,501)
Intangible assets, net			3,175	3,330
Useful life of patents	7 years
Patents and Technology [Member]
Other intangible assets, net [Abstract]
Costs			2,331	2,331
Accumulated amortization			(1,311)	(1,260)
Intangible assets, net			1,020	1,071
Patents [Member]
Other intangible assets, net [Abstract]
Useful life of patents	10 years
Technology [Member]
Other intangible assets, net [Abstract]
Useful life of patents	8 years
Software [Member]
Other intangible assets, net [Abstract]
Costs			1,947	1,819
Accumulated amortization			(1,015)	(966)
Intangible assets, net			$ 932	$ 853
Useful life of patents	5 years