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BUSINESS SEGMENT, GEOGRAPHIC AND CUSTOMER INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenues	$ 106,390	$ 114,391
Depreciation and Amortization	3,305	3,593
Operating Income (Loss)	(1,873)	(3,313)
Assets	72,512	74,255
T and D Segment [Member]
Revenues
Transformers	86,263	86,325
Switchgear	8,747	13,001
Revenues	95,010	99,326
Depreciation and Amortization	1,525	1,730
Operating Income (Loss)	3,155	910
Assets	59,432	60,171
Critical Power Segment [Member]
Revenues
Equipment	1,580	5,898
Service	9,800	9,167
Revenues	11,380	15,065
Depreciation and Amortization	1,718	1,792
Operating Income (Loss)	(1,322)	(682)
Assets	7,745	9,414
Corporate [Member]
Revenues
Depreciation and Amortization	62	71
Operating Income (Loss)	(3,706)	(3,541)
Assets	$ 5,335	$ 4,670

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