GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Balance, beginning	$ 11,044	$ 10,582
Additions due to acquisitions		371
Adjustments	(96)	91
Balance, ending	10,948	11,044
Accumulated impairment losses:
Balance, beginning	(976)	(976)
Balance, ending	(976)	(976)
Net Goodwill	9,972	10,068
T And D Segment [Member]
Goodwill
Balance, beginning	8,074	7,703
Additions due to acquisitions		371
Adjustments	(96)
Balance, ending	7,978	8,074
Accumulated impairment losses:
Balance, beginning	(976)	(976)
Balance, ending	(976)	(976)
Net Goodwill	7,002	7,098
Critical Power Segment [Member]
Goodwill
Balance, beginning	2,970	2,879
Adjustments		91
Balance, ending	2,970	2,970
Accumulated impairment losses:
Net Goodwill	$ 2,970	$ 2,970