DOCUMENT AND ENTITY INFORMATION	9 Months Ended
Sep. 30, 2011	Nov. 02, 2011
Entity Registrant Name	ACORN ENERGY, INC.
Entity Central Index Key	0000880984
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	acfn
Entity Common Stock, Shares Outstanding		17,516,943
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2011

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