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DISCONTINUED OPERATIONS (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Costs and Expenses    
Income (loss) from discontinued operations, net of income taxes $ 7 $ (97)
Swithgear Business [Member]    
Schedule of Equity Method Investments [Line Items]    
Revenues 3,702 2,205
Costs and Expenses    
Cost of goods sold 2,947 1,540
Operating Expenses 630 626
Interest income (1) (1)
Other expense 119 137
Total costs and expenses 3,695 2,302
Income (loss) before provision for income taxes 7 (97)
Income (loss) from discontinued operations, net of income taxes $ 7 $ (97)