Cover
Cover | Nov. 12, 2020 | Sep. 30, 2020 |
Cover [Abstract] | ||
Document Type | 8-K | |
Document Period End Date | Nov. 12, 2020 | |
Entity Registrant Name | ENERGY FOCUS, INC/DE | |
Entity Incorporation, State or Country Code | DE | |
Entity File Number | 001-36583 | |
Entity Tax Identification Number | 94-3021850 | |
Entity Address, Address Line One | 32000 Aurora Road Suite B | |
Entity Address, State or Province | OH | |
Entity Address, Postal Zip Code | 44139 | |
City Area Code | 440 | |
Local Phone Number | 715-1300 | |
Written Communications | false | |
Soliciting Material | false | |
Pre-commencement Tender Offer | false | |
Pre-commencement Issuer Tender Offer | false | |
Title of 12(b) Security | Common Stock, par value $0.0001 per share | |
Trading Symbol | EFOI | |
Security Exchange Name | NASDAQ | |
Entity Emerging Growth Company | false | |
Entity Central Index Key | 0000924168 | |
Amendment Flag | false | |
Entity Addresses [Line Items] | ||
Entity Address, Address Line One | 32000 Aurora Road Suite B | |
Entity Address, Postal Zip Code | 44139 | |
Entity Address, State or Province | OH | |
Entity Address, City or Town | Solon |