GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Summary of goodwill amount
Gross carrying value of goodwill	$ 39,132	$ 39,013	$ 39,054
Accumulated impairment losses	(32,434)	(32,434)	(32,434)
Goodwill, Written off Related to Sale of Business Unit		(41)	(78)
Balance at the end of the period	6,698	6,579	6,620
Usach Technologies Inc. [Member]
Summary of goodwill amount
Goodwill impairment charge	4,800
MMS
Summary of goodwill amount
Gross carrying value of goodwill	32,434	32,434	32,434
Accumulated impairment losses	(32,434)	(32,434)	(32,434)
Goodwill, Written off Related to Sale of Business Unit		0	0
Balance at the end of the period	0	0	0
ATA
Summary of goodwill amount
Gross carrying value of goodwill	6,698	6,579	6,620
Accumulated impairment losses	0	0	0
Goodwill, Written off Related to Sale of Business Unit		(41)	(78)
Balance at the end of the period	$ 6,698	$ 6,579	$ 6,620