Nature of Operations	12 Months Ended
Nature of Operations	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	NATURE OF OPERATIONS Energy Focus, Inc. engages primarily in the design, development, manufacturing, marketing and sale of energy-efficient lighting systems and controls. We develop, market and sell high quality light-emitting diode (“LED”) lighting and controls products in the commercial market and military maritime market (“MMM”), and began to expand our offerings into the consumer market in the fourth quarter of 2021. Our mission is to enable our customers to run their facilities, offices with greater energy efficiency, productivity, and human health and wellness through advanced LED retrofit solutions. Our goal is to be the human wellness lighting and LED technology and market leader for the most demanding applications where performance, quality, value, environmental impact and health are considered paramount. We specialize in LED lighting retrofit by replacing fluorescent, high-intensity discharge lighting and other types of lamps in institutional buildings for primarily indoor lighting applications with our innovative, high-quality commercial and military-grade tubular LED (“TLED”) products, as well as other LED and lighting control products for commercial and consumer applications. In late 2020, we announced the launch of ultraviolet-C light disinfection (“UVCD”) products. After evaluating market demand and supply chain challenges for our UVCD products, we revised our business strategy to primarily focus on our MMM and commercial and industrial lighting and control products. We are also evaluating adjacent technologies including Gallium Nitride (“GaN”) based power supplies and additional market opportunities in energy solution products that promote sustainability. The LED lighting industry has changed dramatically over the past several years due to increasing competition and price erosion. We have been experiencing these industry forces in both our military business since 2016 and in our commercial segment, where we once commanded significant price premiums for our flicker-free TLEDs with primarily 10-year warranties. In more recent years, we have focused on redesigning our products for lower costs and consolidated our supply chain for stronger purchasing power in an effort to price our products more competitively. Despite these efforts, our legacy products continue to face aggressive pricing competition and a convergence of product functionality in the marketplace, and we have shifted to diversifying our supply chain in an effort to increase value and remain competitive. These trends are not unique to Energy Focus as evidenced by the increasing number of industry peers facing challenges, exiting LED lighting, selling assets and even going out of business. In addition to continuously pursuing cost reductions, our strategy to combat these trends is to innovate both our technology and product offerings with differentiated products and solutions that offer greater, distinct value. Specific examples of these products we have developed include the RedCap®, our emergency backup battery integrated TLED, EnFocus™, our new dimmable/color-tunable lighting and powerline control platform that we launched in 2020, and the second generation of EnFocus™ powerline control switches and circadian lighting system for both commercial and residential markets, which as a result of supply chain challenges we now plan to launch in 2023. Similarly, our plans to expand and enhance the performance of our RedCap® product line are also now expected in 2023. We continue to evaluate our sales strategy and believe our go-to-market strategy that focuses more on direct-sales marketing, selectively expanding our channel partner network to cover territories across the country, and listening to the voice of the customer, will lead to better and more impactful product development efforts that we believe will eventually translate into larger addressable markets and greater sales growth for us. The Company has experienced significant sales declines, operating losses and increases in its inventory. Beginning in 2019, significant restructuring efforts were undertaken. The Company replaced the entire senior management team, significantly reduced non-critical expenses, minimized the amount of inventory the Company was purchasing, dramatically changed the composition of our board of directors (“Board of Directors”) and the executive team, and recruited new departmental leaders across the Company. The initial cost savings efforts to reduce costs to minimize cash usage included the elimination of certain positions, restructuring of the sales organization and incentive plan, flattening of the senior management team, additional operational streamlining, management compensation reductions, and outsourcing of certain functions including certain elements of supply chain and marketing. During 2021 and 2022, we realized initial cost-savings benefits from these relaunch efforts, but continued to face significant operating losses. Despite these cost-cutting efforts, the company faced a challenging commercial market with continuing impacts from the global pandemic combined with ongoing delays in MMM projects and funding that continued to depress sales through 2021 while the company invested in exploring additional lines of business with UVCD technology that ultimately gained little traction in the market. At the beginning of 2022, the board of directors appointed our lead independent director to serve as interim chief executive officer and replace our previous chief executive officer. During 2022, the company expanded its cost-reduction efforts, reduced its warehouse square footage, undertook an inventory reduction project, and dramatically reduced head count. In February and September of 2022, we also added three experienced executives to our Board of Directors with extensive lighting and consumer products industry experience. We reinvested in our MMM sales channel with a strategic hire in May 2022 and continue to pursue these sales opportunities, though the sales cycles for what are frequently made-to-order products are longer than commercial offerings.