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Business Segment and Geographic Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 26,460 | $ 21,064 | $ 55,348 | $ 41,957
Operating Income (Loss) | (687) | 571 | (770) | 1,568
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 26,460 | 21,064 | 55,348 | 41,957
Depreciation and Amortization | 793 | 421 | 1,578 | 825
Operating Income (Loss) | (687) | 571 | (770) | 1,568
Operating Segments [Member] | T & D Solutions Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 20,914 | 20,857 | 44,577 | 40,607
Depreciation and Amortization | 397 | 392 | 790 | 769
Operating Income (Loss) | 483 | 1,401 | 2,189 | 2,957
Operating Segments [Member] | Critical Power Solutions Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 5,546 | 207 | 10,771 | 1,350
Depreciation and Amortization | 379 | 18 | 755 | 35
Operating Income (Loss) | (586) | (263) | (1,378) | (227)
Operating Segments [Member] | Corporate Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and Amortization | 17 | 11 | 33 | 21
Operating Income (Loss) | $ (584) | $ (567) | $ (1,581) | $ (1,162)

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