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Discontinued Operations - Schedule of Financial Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Revenues | $ 4,618 us-gaap_Revenues | $ 4,454 us-gaap_Revenues
Gross profit | 1,519 us-gaap_GrossProfit | 1,430 us-gaap_GrossProfit
Net loss | (2,934)us-gaap_ProfitLoss | (4,575)us-gaap_ProfitLoss
Net loss attributable to Acorn Energy Inc. | (2,769)us-gaap_NetIncomeLoss | (4,304)us-gaap_NetIncomeLoss
U.S. Seismic Systems, Inc [Member] | Discontinued Operations [Member] |  |
Revenues |  |
Gross profit | (90)us-gaap_GrossProfit / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (188)us-gaap_GrossProfit / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Net loss | (1,152)us-gaap_ProfitLoss / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,956)us-gaap_ProfitLoss / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Net loss attributable to non-controlling interests | 145 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 246 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Net loss attributable to Acorn Energy Inc. | $ (1,007)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (1,710)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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