Nature of Operations	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	NATURE OF OPERATIONSEnergy Focus, Inc. engages primarily in the design, development, manufacturing, marketing and sale of energy-efficient lighting and controls systems and ultraviolet-C light disinfection (“UVCD”) products. We develop, market and sell high quality light-emitting diode (“LED”) lighting and controls products and UVCD products in the commercial market and military maritime market (“MMM”), and expanded our offerings into the consumer market beginning in the fourth quarter of 2021. Our mission is to enable our customers to run their facilities, offices and homes with greater energy efficiency, productivity, and human health and wellness through advanced LED retrofit and UVCD solutions. Our goal is to be the human wellness lighting and LED lighting 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 our UVCD product portfolio. With initial development complete and two products now brought to market, we expect to evaluate the potential development of additional UVCD products in 2022.