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Nature of Operations	9 Months Ended
	Sep. 30, 2015
Disclosure Text Block [Abstract]
Nature of Operations	NATURE OF OPERATIONS Energy Focus, Inc. and its subsidiaries engage in the design, development, manufacturing, marketing, and sale of energy-efficient lighting systems. We operate in a single industry segment, developing and selling our energy-efficient light-emitting diode (“LED”) lighting products into the government, military and maritime, and general commercial and industrial markets. We have aligned our resources and focused our efforts on the sale of our LED lighting products, in particular our military and commercial tubular LED (“TLED”) lines of products, into targeted vertical markets. During 2014, we shifted our focus away from the turnkey solutions business, which has historically incurred lower gross margins. We completed all outstanding solutions-based projects in the first quarter of 2015, are no longer accepting new projects, and the warranty periods for the final projects expired during the third quarter of 2015. In August 2015, we sold our United Kingdom subsidiary, Crescent Lighting Limited. As a result of exiting the turnkey solutions and Crescent Lighting Limited businesses, we have eliminated all net sales and expenses associated with both businesses from the Condensed Consolidated Statements of Operations and have reported the net loss as discontinued operations. Please refer to Note 3. Discontinued operations, for more information on our disposition of these businesses.

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- Definition

The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592

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