XML 12 R1.htm IDEA: XBRL DOCUMENT v3.24.1
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Mar. 18, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-36583    
Entity Registrant Name ENERGY FOCUS, INC/DE    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 94-3021850    
Entity Address, Address Line One 32000 Aurora Road    
Entity Address, Address Line Two Suite B    
Entity Address, City or Town Solon    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44139    
City Area Code 440    
Local Phone Number 715.1300    
Title of 12(b) Security Common stock, par value $0.0001 per share    
Trading Symbol EFOI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 2.2
Entity Common Stock, Shares Outstanding   4,443,130  
Documents Incorporated by Reference
Portions of the definitive proxy statement to be filed with the Securities and Exchange Commission relative to the registrant’s 2023 Annual Meeting of Shareholders are incorporated by reference into Part III of this Report.
    
Entity Central Index Key 0000924168    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false