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Discontinued Operations - Schedule of Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues	$ 4,761	$ 3,710
Gross profit (loss)	1,631	1,242
Net loss	(3,026)	(2,934)
Net loss attributable to Acorn Energy Inc.	(2,975)	(2,769)
GridSense [Member] | Discontinued Operations [Member]
Revenues	143	908
Gross profit (loss)	(30)	277
Net loss	$ (1,386)	$ (325)
U.S. Seismic Systems, Inc [Member] | Discontinued Operations [Member]
Revenues
Gross profit (loss)		$ (90)
Net loss		(1,152)
Net loss attributable to non-controlling interests		145
Net loss attributable to Acorn Energy Inc.		$ (1,007)

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