XML 15 R1.htm IDEA: XBRL DOCUMENT v3.3.1.900
Document and Entity Information - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Mar. 25, 2016
Jun. 30, 2015
Document And Entity Information      
Entity Registrant Name ACORN ENERGY, INC.    
Entity Central Index Key 0000880984    
Document Type 10-K    
Document Period End Date Dec. 31, 2015    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity a Well-known Seasoned Issuer No    
Entity a Voluntary Filer No    
Entity's Current Reporting Status Yes    
Entity Filer Category Smaller Reporting Company    
Entity Public Float     $ 10,900
Entity Common Stock, Shares Outstanding   27,325,591  
Trading Symbol ACFN    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2015