CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Projects	$ 11,368	$ 11,235	$ 8,807
Smart grid distribution products and services	7,119	2,382	0
Other	441	627	412
Revenues	18,928	14,244	9,219
Cost of sales:
Projects	7,886	6,646	4,946
Smart grid distribution products and services	3,792	1,210	0
Other	337	344	318
Cost of sales	12,015	8,200	5,264
Gross profit	6,913	6,044	3,955
Operating expenses:
Research and development expenses, net	2,995	965	457
Selling, general and administrative expenses	11,952	10,440	5,702
Total operating expenses	14,947	12,571	6,240
Operating loss	(8,034)	(6,527)	(2,285)
Gain on investment in GridSense	0	1,327	0
Distribution from EnerTech	0	135	0
Gain on sale of HangXing	492	0	0
Income tax (expense) benefit	(12,767)	671	(719)
Net income (loss) from continuing operations	5,199	(7,781)	(100)
Loss from discontinued operations	(1,948)	(17,969)	(6,076)
Gain on the sale of discontinued operations, net of income taxes	31,069	0	0
Non-controlling interest share of loss from discontinued operations	(540)	(67)	(626)
Net income (loss)	34,860	(25,683)	(5,550)
Income (loss) from operations of the Company and its consolidated subsidiaries	5,199	(7,781)	(234)
Net loss attributable to non-controlling interests	549	595	(206)
Net income (loss) attributable to Acorn Energy, Inc.	35,409	(25,088)	(5,756)
Basic income (loss) per share attributable to Acorn Energy, Inc. shareholders:
From continuing operations (in dollars per share)	$ (330)	$ (480)	$ 20
From discontinued operations (in dollars per share)	$ 1,700	$ (1,200)	$ (480)
Net income (loss) per share attributable to Acorn Energy, Inc. shareholders (in dollars per share)	$ 2,030	$ (1,680)	$ (500)
Weighted average number of shares outstanding attributable to Acorn Energy Inc. - basic (in shares)	17,462	14,910	11,445
Diluted income (loss) per share attributable to Acorn Energy, Inc. shareholders:
From continuing operations (in dollars per share)	$ 320
From discontinued operations (in dollars per share)	$ 1,670
Net income (loss) per share attributable to Acorn Energy, Inc. shareholders (in dollars per share)	$ 1,990	$ (1,680)
Weighted average number of shares outstanding attributable to Acorn Energy, Inc. - diluted (in shares)	17,743
Impairments	0	1,166	81
Gain on sale of shares in Comverge	0	0	1,403
Gain on investment in GridSense	0	1,327	0
Loss on sale of EnerTech	0	(1,821)	0
Loss before taxes on income	(7,568)	(7,110)	(953)
Share of income of Paketeria	0	0	263
Share of losses of GridSense	$ 0	$ 0	$ (129)