GOODWILL AND OTHER INTANGIBLE ASSETS (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($)
Goodwill
Balance, beginning	$ 10,948
No activity
Balance, ending	10,948
Accumulated impairment losses:
Balance, beginning	(2,421)
Impairment charges
Balance, ending	(2,421)
Net Goodwill	8,527
T And D Segment [Member]
Goodwill
Balance, beginning	7,978
No activity
Balance, ending	7,978
Accumulated impairment losses:
Balance, beginning	(2,421)
Impairment charges
Balance, ending	(2,421)
Net Goodwill	5,557
Critical Power Segment [Member]
Goodwill
Balance, beginning	2,970
No activity
Balance, ending	2,970
Accumulated impairment losses:
Impairment charges
Net Goodwill	$ 2,970

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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