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Basis of Presentation (Narrative) (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Oct. 05, 2015
USD ($)
$ / shares
shares
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 24, 2013
USD ($)
$ / shares
shares
Dec. 31, 2015
Segment
Number of reportable segments | Segment       2
Issuance of common stock, shares | shares 168,750 1,125,000 1,265,000  
Issuance of common stock, per share | $ / shares $ 4.00 $ 4.00 $ 7.00  
Net proceeds from issuance of common stock $ 0.6 $ 3.9 $ 7.9  
Stock issued during period, shares, new issues | shares 168,750 1,125,000 1,265,000  
Proceeds from Issuance of Common Stock $ 0.6 $ 3.9 $ 7.9  
Underwriters [Member]        
Net proceeds from issuance of common stock 0.6      
Proceeds from Issuance of Common Stock $ 0.6      
Titan [Member]        
Business Acquisition, Percentage of Voting Interests Acquired       100.00%
Business acquisition, effective date of acquisition       Dec. 02, 2014
Business Acquisition, Name of Acquired Entity       Titan Energy Worldwide, Inc.
Business Acquisition, Description of Acquired Entity       a Minneapolis-based provider of sales and service for commercial and industrial-scale onsite power systems, including generators and associated switching equipment.
Harmonics Holdings Inc. [Member]        
Business acquisition, effective date of acquisition       Jan. 16, 2015
Business Acquisition, Name of Acquired Entity       Harmonics Holdings Inc.
Business Acquisition, Description of Acquired Entity       a New Haven, Connecticut based specialty provider of equipment that incorporates a patented technology for the elimination of harmonic currents in power distribution systems.
Pacific Power Systems Integration Inc. [Member]        
Business acquisition, effective date of acquisition       Aug. 01, 2015
Business Acquisition, Name of Acquired Entity       Pacific Power Systems Integration, Inc.
Business Acquisition, Description of Acquired Entity       a Santa Fe Springs, California based manufacturer of custom electrical power distribution and control equipment, with a specific emphasis on low voltage draw-out, metal-enclosed and metal-clad switchgear.