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DISCONTINUED OPERATIONS (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Costs and Expenses        
Loss from discontinued operations, net of income taxes $ (730) $ (576) $ (1,440) $ (1,084)
Switchgear Business [Member]        
Schedule of Equity Method Investments [Line Items]        
Revenues 1,274 4,299 5,858 10,118
Costs and Expenses        
Cost of goods sold 1,504 4,052 5,619 8,957
Operating Expenses 438 692 1,503 1,763
Interest income (1) (1) (4) (4)
Other expense 257 132 563 486
Total costs and expenses 2,198 4,875 7,681 11,202
Loss before provision for income taxes (924) (576) (1,823) (1,084)
Income tax benefit (194)   (383)  
Loss from discontinued operations, net of income taxes $ (730) $ (576) $ (1,440) $ (1,084)