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SUMMARY QUARTERLY FINANCIAL DATA (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
SUMMARY QUARTERLY FINANCIAL DATA [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 4,796 | $ 4,713 | $ 5,727 | $ 4,183 | $ 6,675 | $ 5,051 | $ 4,107 | $ 3,095 | $ 19,419 | $ 18,928 | $ 14,244
Cost of sales | 3,767 | 3,225 | 4,241 | 2,983 | 4,090 | 3,244 | 2,760 | 1,921 | 14,216 | 12,015 | 8,200
Gross profit | 1,029 | 1,488 | 1,486 | 1,200 | 2,585 | 1,807 | 1,347 | 1,174 | 5,203 | 6,913 | 6,044
Research and development expenses, net | 1,819 | 1,754 | 1,699 | 1,318 | 1,408 | 713 | 384 | 490 | 6,590 | 2,995 | 965
Selling, general and administrative expenses | 5,470 | 5,272 | 4,390 | 4,229 | 3,343 | 3,142 | 2,724 | 2,743 | 19,361 | 11,952 | 10,440
Operating loss | (6,260) | (5,538) | (4,603) | (4,347) | (2,166) | (2,048) | (1,761) | (2,059) | (20,748) | (8,034) | (6,527)
Finance Income (Expense), Net | 110 | (160) | 130 | (23) | (71) | 262 | (100) | (117) | 57 | (26) | (224)
Gain on sale of HangXing | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 492 | 0 | 492 | 0
Income (loss) before taxes on income | 6,150 | 5,698 | 4,473 | 4,370 | 2,237 | 1,786 | 1,861 | 1,684 | 20,691 | 7,568 | 7,110
Income Tax (expense) benefit | 480 | 1,487 | 1,064 | (75) | 695 | 12,111 | 26 | (65) | 2,956 | 12,767 | (671)
Net income (loss) from continuing operations | (5,670) | (4,211) | (3,409) | (4,445) | (1,542) | 10,325 | (1,835) | (1,749) | (17,735) | 5,199 | (7,781)
Gain on the sale of CoaLogix, net of income taxes | 0 | 0 | 0 | 0 | (386) | (30,683) | 0 | 0 | 0 | (31,069) | 0
Loss From Discontinued Operations Net Of Tax | 0 | 0 | 0 | 0 | 0 | (544) | (568) | (836) | 0 | (1,948) | (17,969)
Noncontrolling Interest Share of Loss from Discontinued Operations | 0 | 0 | 0 | 0 | 0 | 151 | 157 | 232 | 0 | 540 | 67
Net income (loss) | (5,670) | (4,211) | (3,409) | (4,445) | (1,156) | 40,615 | (2,246) | (2,353) | (17,735) | 34,860 | (25,683)
Net Income (Loss) Attributable to Noncontrolling Interest | 287 | 276 | 205 | 256 | 65 | 181 | 167 | 136 | 1,024 | 549 | 595
Net income (loss) attributable to Acorn Energy, Inc. | $ (5,383) | $ (3,935) | $ (3,204) | $ (4,189) | $ (1,091) | $ 40,796 | $ (2,079) | $ (2,217) | $ (16,711) | $ 35,409 | $ (25,088)
From continuing operations | $ (0.30) |  |  |  | $ (0.08) | $ 0.60 | $ (0.10) | $ (0.10) | $ (0.93) | $ 0.33 | $ (0.48)
From discontinued operations | $ 0.00 |  |  |  | $ 0.02 | $ 1.73 | $ (0.02) | $ (0.03) | $ 0.00 | $ 1.70 | $ (1.20)
Earnings Per Share, Basic | $ (0.30) | $ (0.22) | $ (0.18) | $ (0.24) | $ (0.06) | $ 2.33 | $ (0.12) | $ (0.13) | $ (0.93) | $ 2.03 | $ (1.68)
From continuing operations | $ (0.30) |  |  |  | $ (0.08) | $ 0.59 | $ (0.10) | $ (0.10) | $ (0.93) | $ 0.32 | $ (0.48)
From discontinued operations | $ 0.00 |  |  |  | $ 0.02 | $ 1.70 | $ (0.02) | $ (0.03) | $ 0.00 | $ 1.67 | $ (1.20)
Earnings Per Share, Diluted |  |  |  |  | $ (0.06) | $ 2.29 | $ (0.12) | $ (0.13) | $ (0.93) | $ 1.99 | $ (1.68)
Weighted Average Number of Shares Outstanding, Basic | 18,038 | 17,934 | 17,912 | 17,680 | 17,521 | 17,508 | 17,489 | 17,449 | 17,891 | 17,462 | 14,910
Weighted Average Number of Shares Outstanding, Diluted | 18,038 | 17,934 | 17,912 | 17,680 | 17,521 | 17,810 | 17,489 | 17,449 | 17,891 | 17,743 | 14,910

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