DOCUMENT AND ENTITY INFORMATION (USD $)	3 Months Ended
	Mar. 31, 2012	Jun. 30, 2012	May 03, 2012
Entity Registrant Name	ACORN ENERGY, INC.
Entity Central Index Key	0000880984
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding			17,890,250
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 64,500,000