Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The condensed consolidated financial statements (“financial statements”) include the accounts of the Company and its subsidiaries, Energy Focus LED Solutions, LLC (“EFLS”) in Solon, Ohio, and Crescent Lighting Limited (“CLL”), and its subsidiary, Energy Focus Europe, Ltd, each located in the United Kingdom. All significant inter-company balances and transactions have been eliminated. Please refer to Note 13. Subsequent Events, for information about our disposition of CLL subsequent to June 30, 2015. We have prepared the accompanying financial data for the three and six months ended June 30, 2015 and 2014 pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted pursuant to such rules and regulations. The accompanying financial data and information should be read in conjunction with our 2014 Annual Report. In the opinion of management, the accompanying financial statements contain all normal and recurring adjustments necessary to present fairly our Condensed Consolidated Balance Sheets as of June 30, 2015 and December 31, 2014, Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2015 and 2014, Condensed Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June 30, 2015 and 2014, Condensed Consolidated Statement of Stockholders’ Equity for the six months ended June 30, 2015, and Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2015 and 2014.
Use of estimates	Use of estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management’s best knowledge of current events and actions that may impact us in the future, actual results may vary from the estimates. Estimates include, but are not limited to, the establishment of reserves for accounts receivable, sales returns, inventory obsolescence and warranty claims; the useful lives of property and equipment; revenues recognized on a percentage-of-completion basis; and stock-based compensation. In addition, estimates and assumptions associated with the determination of the fair value of financial instruments and evaluation of long-lived assets for impairment requires considerable judgment. Actual results could differ from those estimates and such differences could be material.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified within the financial statements, and related notes thereto, to be consistent with current period presentation.
Certain risks and concentrations	Certain risks and concentrations We have certain customers whose net sales individually represented 10 percent or more of our total net sales, or whose net trade accounts receivable balance individually represented 10 percent or more of our total net trade accounts receivable
Recent accounting pronouncements	Recent accounting pronouncements In January 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-01, Income Statement-Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items, which provides guidance on simplifying income statement presentation by eliminating the concept of extraordinary items from U.S. GAAP. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively and retrospectively to all periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. We have evaluated the accounting guidance and determined that there is no impact of this update to our consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue Recognition - Revenue from Contracts with Customers, which is a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under U.S. GAAP. The standard was to be effective for interim and annual periods beginning after December 15, 2016. However, on July 9, 2015, the FASB decided to delay the effective date of the standard by one year. Either full retrospective adoption or modified retrospective adoption is permitted. We are in the process of evaluating the impact of the standard. In April 2014, the FASB issued ASU No. 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for reporting discontinued operations while enhancing disclosures in this area. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. Those strategic shifts should have a major effect on the organization’s operations and financial results. Examples include a disposal of a major geographic area, a major line of business, or a major equity method investment. Additionally, the new guidance requires expanded disclosures about discontinued operations that will provide financial statement users with more information about the assets, liabilities, income, expenses of discontinued operations and of the pretax income attributable to a disposal of a significant part of an organization that does not qualify for discontinued operations reporting. The new standard is effective for interim and annual periods beginning after December 15, 2014. We have evaluated the accounting guidance and determined that this update will have no effect on our consolidated financial statements.
Net income (loss) per share	Net income (loss) per share Basic earnings (loss) per share is computed by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period, excluding the effects of any potentially dilutive securities. Diluted earnings (loss) per share gives effect to all dilutive potential common shares outstanding during the period. Dilutive potential common shares consist of incremental shares upon the exercise of stock options and warrants, unless the effect would be anti-dilutive.
Product warranties	Product warranties We warrant finished goods against defects in material and workmanship under normal use and service for periods generally between one and five years. Settlement costs consist of actual amounts expensed for warranty which are largely a result of the cost of replacement products. A liability for the estimated future costs under product warranties is maintained for products and services outstanding under warranty.