GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of goodwill amount
Gross carrying value of goodwill	$ 39,054	$ 39,132	$ 37,588
Accumulated impairment losses	(32,434)	(32,434)	(27,586)
Balance at the beginning of the period	6,698	10,002
Acquisitions		1,626
Impairment Loss		(4,848)
Goodwill, Written off Related to Sale of Business Unit	(78)	(82)
Goodwill, Period Increase (Decrease)		(3,304)
Balance at the end of the period	6,620	6,698	10,002
Usach Technologies Inc. [Member]
Summary of goodwill amount
Impairment Loss			(3,800)
MMS
Summary of goodwill amount
Gross carrying value of goodwill	32,434	32,434	32,434
Accumulated impairment losses	(32,434)	(32,434)	(27,586)
Balance at the beginning of the period	0	4,848
Acquisitions		0
Impairment Loss		(4,848)
Goodwill, Written off Related to Sale of Business Unit	0	0
Goodwill, Period Increase (Decrease)		(4,848)
Balance at the end of the period	0	0	4,848
ATA
Summary of goodwill amount
Gross carrying value of goodwill	6,620	6,698	5,154
Accumulated impairment losses	0	0	0
Balance at the beginning of the period	6,698	5,154
Acquisitions		1,626
Impairment Loss		0
Goodwill, Written off Related to Sale of Business Unit	(78)	(82)
Goodwill, Period Increase (Decrease)		1,544
Balance at the end of the period	$ 6,620	$ 6,698	$ 5,154