Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
	Apr. 01, 2016	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Nov. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Warranty service periods	10 years
Loss on disposal of discontinued operations		$ 0		$ (36)		$ (12)	$ (72)
Escrow deposit		$ 0		$ 300		$ 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