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SUMMARY QUARTERLY FINANCIAL DATA | 12 Months Ended
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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 Acorn Energy, 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 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 23, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 30 -Subparagraph a-j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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