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Acquisitions (Narrative) (Details)
 9 Months Ended 21 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
entity
Dec. 31, 2014
USD ($)
Business Acquisition [Line Items]      
Number of businesses acquired | entity   3  
Titan Energy Worldwide Inc. [Member]      
Business Acquisition [Line Items]      
Business acquisition, effective date of acquisition Dec. 02, 2014    
Equity method investment, ownership percentage     100.00%
Transaction costs incurred     $ 700,000
Harmonics Holdings Inc. [Member]      
Business Acquisition [Line Items]      
Business acquisition, effective date of acquisition Jan. 16, 2015    
Transaction costs incurred $ 13,000 $ 13,000  
Pacific Power Systems Integration Inc. [Member]      
Business Acquisition [Line Items]      
Business acquisition, effective date of acquisition Aug. 01, 2015    
Transaction costs incurred $ 56,000 $ 56,000