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Business Segment, Geographic and Customer Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets | $ 66,939 | $ 72,838
Operating Segments [Member] |  |
Assets | 66,939 | 72,838
T And D Solutions Segment [Member] | Operating Segments [Member] |  |
Assets | 49,113 | 53,430
Critical Power Solutions Segment [Member] | Operating Segments [Member] |  |
Assets | 13,841 | 13,994
Corporate [Member] | Operating Segments [Member] |  |
Assets | $ 3,985 | $ 5,414

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