SUMMARY QUARTERLY FINANCIAL DATA

12 Months Ended

Dec. 31, 2011

SUMMARY QUARTERLY FINANCIAL DATA [Abstract]

Quarterly Financial Information [Text Block]

SUMMARY QUARTERLY FINANCIAL DATA (Unaudited)

The following table sets forth certain of the Company's unaudited quarterly consolidated financial information for the years ended December 31, 2010 and 2011.  

	2010												2011
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			First Quarter			Second Quarter			Third Quarter			Fourth Quarter
	(in thousands, except per share amounts
Revenues	$	2,606		$	3,372		$	4,018		$	4,249		$	3,095		$	4,107		$	5,051		$	6,675
Cost of sales	1,424			1,749			2,221			2,807			1,921			2,760			3,244			4,090
Gross profit	1,182			1,623			1,797			1,442			1,174			1,347			1,807			2,585
Research and development expenses, net	41			179			281			463			490			384			713			1,408
Impairments	—			—			—			1,166			—			—			—			—
Selling, general and administrative expenses	2,247			2,592			2,830			2,772			2,743			2,724			3,142			3,343
Operating loss	(1,106		)	(1,148		)	(1,314		)	(2,959		)	(2,059		)	(1,761		)	(2,048		)	(2,166		)
Finance income (expense), net	5			(197		)	53			(85		)	(117		)	(100		)	262			(71		)
Gain on investment in GridSense	—			1,327			—			—			—			—			—			—
Gain on sale of HangXing	—			—			—			—			492			—			—			—
Distribution received from EnerTech	135			—			—			—			—			—			—			—
Loss on the sale of EnerTech	—			—			—			(1,821		)	—			—			—			—
Income (loss) before taxes on income	(966		)	(18		)	(1,261		)	(4,865		)	(1,684		)	(1,861		)	(1,786		)	(2,237		)
Income tax benefit (expense)	(75		)	(123		)	(372		)	(101		)	(65		)	26			12,111			695
Net income (loss) from continuing operations	(1,041		)	(141		)	(1,633		)	(4,966		)	(1,749		)	(1,835		)	10,325			(1,542		)
Gain on the sale of CoaLogix, net of income taxes	—			—			—			—			—			—			30,683			386
Loss from discontinued operations, net of income taxes	(2,132		)	(3,275		)	(3,307		)	(9,255		)	(836		)	(568		)	(544		)	—
Non-controlling interests share of loss from discontinued operations	(5		)	45			244			(217		)	232			157			151			—
Net income (loss)	(3,178		)	(3,371		)	(4,696		)	(14,438		)	(2,353		)	(2,246		)	40,615			(1,156		)
Net (income) loss attributable to non-controlling interests	55			220			129			191			136			167			181			65
Net income (loss) attributable to AcornEnergy, Inc	$	(3,123	)	$	(3,151	)	$	(4,567	)	$	(14,247	)	$	(2,217	)	$	(2,079	)	$	40,796		$	(1,091	)
Basic net income (loss) per share attributable to Acorn Energy, Inc. shareholders:
From continuing operations	$	(0.08	)	$	—		$	(0.10	)	$	(0.30	)	$	(0.10	)	$	(0.10	)	$	0.60		$	(0.08	)
From discontinued operations	(0.17		)	(0.21		)	(0.19		)	(0.58		)	(0.03		)	(0.02		)	1.73			0.02
Total attributable to Acorn Energy, Inc. shareholders.	$	(0.25	)	$	(0.21	)	$	(0.29	)	$	(0.88	)	$	(0.13	)	$	(0.12	)	$	2.33		$	(0.06	)
Diluted net income (loss) per share attributable to Acorn Energy, Inc. shareholders:
From continuing operations	$	(0.08	)	$	—		$	(0.10	)	$	(0.30	)	$	(0.10	)	$	(0.10	)	$	0.59		$	(0.08	)
From discontinued operations	(0.17		)	(0.21		)	(0.19		)	(0.58		)	(0.03		)	(0.02		)	1.70			0.02
Total attributable to Acorn Energy, Inc. shareholders.	$	(0.25	)	$	(0.21	)	$	(0.29	)	$	(0.88	)	$	(0.13	)	$	(0.12	)	$	2.29		$	(0.06	)
Weighted average number of shares outstanding attributable to Acorn Energy, Inc. – basic	12,498			15,161			15,721			16,254			17,449			17,489			17,508			17,521
Weighted average number of shares outstanding attributable to Acorn Energy, Inc. – diluted	12,498			15,161			15,721			16,254			17,449			17,489			17,810			17,521