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Cover - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2024
Mar. 04, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2024    
Current Fiscal Year End Date --12-31    
Entity File Number 001-33886    
Entity Registrant Name ACORN ENERGY, INC.    
Entity Central Index Key 0000880984    
Entity Tax Identification Number 22-2786081    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1000 N West Street    
Entity Address, Address Line Two Suite 1200    
Entity Address, City or Town Wilmington    
Entity Address, State or Province DE    
Entity Address, Postal Zip Code 19801    
City Area Code 770    
Local Phone Number 209-0012    
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    
Entity Shell Company false    
Entity Public Float     $ 16.1
Entity Common Stock, Shares Outstanding   2,491,130  
Documents Incorporated by Reference None    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.01    
Auditor Firm ID 688    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of Acorn Energy, Inc. (the “Company”) as of December 31, 2024 and 2023, the related consolidated statements of operations, changes in equity (deficit), and cash flows for each of the two years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the two years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name Marcum LLP    
Auditor Location Marlton, New Jersey