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BASIS OF PRESENTATION Schedule of Quantifying a Prior Year Misstatement (Tables)
 3 Months Ended
Mar. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Quantifying Prior Year Misstatements Corrected in Current Year Financial Statements [Table Text Block]
The effect of the restatement on the Company's net loss and basic and diluted loss per share for the three-month periods ended on each of March 31, June 30, and September 30, 2012, the six month period ended June 30, 2012 and the nine month period ended September 30, 2012 are shown below:

 
 
Three months ended
 
Six months ended
 
Three months ended
 
Nine months ended
 
Three months ended
 
 
March 31, 2012
 
June 30, 2012
 
September 30, 2012
Net loss attributable to Acorn Energy, Inc. shareholders - as reported
 
$
(4,178
)
 
$
(7,290
)
 
$
(3,112
)
 
$
(11,040
)
 
$
(3,750
)
Net effect of restatement
 
(11
)
 
(103
)
 
(92
)
 
(288
)
 
(185
)
Net loss attributable to Acorn Energy, Inc. shareholders - restated
 
$
(4,189
)
 
$
(7,393
)
 
$
(3,204
)
 
$
(11,328
)
 
$
(3,935
)
 
 
 
 
 
 
 
 
 
 
 
Basic and diluted net loss per share attributable to Acorn Energy, Inc. shareholders - as reported
 
$
(0.24
)
 
$
(0.41
)
 
$
(0.17
)
 
$
(0.62
)
 
$
(0.21
)
Net effect of restatement
 
—

 
(0.01
)
 
(0.01
)
 
(0.01
)
 
(0.01
)
Basic and diluted net loss per share attributable to Acorn Energy, Inc. shareholders - restated
 
$
(0.24
)
 
$
(0.42
)
 
$
(0.18
)
 
$
(0.63
)
 
$
(0.22
)