BUSINESS SEGMENT, GEOGRAPHIC AND CUSTOMER INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenues
Revenues	$ 114,402	$ 106,522
Depreciation and Amortization	3,089	3,165
Operating Income (Loss)	1,355	(5,300)
Assets	77,408	66,876
T And D Segment [Member]
Revenues
Transformers	81,111	75,598
Switchgear	14,759	9,273
Revenues	95,870	84,871
Depreciation and Amortization	1,617	1,643
Operating Income (Loss)	4,499	(972)
Assets	59,779	50,890
Critical Power Segment [Member]
Revenues
Equipment	10,166	14,929
Service	8,366	6,722
Revenues	18,532	21,651
Depreciation and Amortization	1,405	1,449
Operating Income (Loss)	62	(847)
Assets	10,620	12,173
Corporate [Member]
Revenues
Depreciation and Amortization	67	73
Operating Income (Loss)	(3,206)	(3,481)
Assets	$ 7,009	$ 3,813