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Discontinued Operations - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
Sep. 30, 2015
Mar. 31, 2015
Dec. 31, 2015
Nov. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Loss on disposal of discontinued operations $ (12)   $ (36)    
Escrow deposit $ 0   $ 300    
Energy Focus LED Solutions, LLC          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Warranty service periods     1 year    
Crescent Lighting Limited          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Loss on disposal of discontinued operations   $ (44)      
Reclassification adjustment for foreign currency translation adjustments   $ (469)      
Pool products          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Sale price         $ 5,200
Escrow deposit       $ 300 $ 500
Cash held in escrow, released       $ 200