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Discontinued Operations - Schedule of Assets and Liabilities Related to Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Cash and cash equivalents	$ 2,099us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 4,821us-gaap_CashAndCashEquivalentsAtCarryingValue
Other current assets	1,877us-gaap_OtherAssetsCurrent	1,813us-gaap_OtherAssetsCurrent
Total assets	26,899us-gaap_Assets	29,543us-gaap_Assets
Accounts payable	2,511us-gaap_AccountsPayableCurrent	2,187us-gaap_AccountsPayableCurrent
Other current liabilities	3,518us-gaap_OtherLiabilitiesCurrent	3,028us-gaap_OtherLiabilitiesCurrent
USSI [Member] | Discontinued Operations [Member]
Cash and cash equivalents	87us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	52us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Other current assets	54us-gaap_OtherAssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	91us-gaap_OtherAssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Total assets	141us-gaap_Assets / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	143us-gaap_Assets / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Short-term bank credit	1,460us-gaap_ShortTermBankLoansAndNotesPayable / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	1,460us-gaap_ShortTermBankLoansAndNotesPayable / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Accounts payable	1,001us-gaap_AccountsPayableCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	1,006us-gaap_AccountsPayableCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Accrued payroll, payroll taxes and social benefits	90us-gaap_AccruedPayrollTaxesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	346us-gaap_AccruedPayrollTaxesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Other current liabilities	1,821us-gaap_OtherLiabilitiesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	1,881us-gaap_OtherLiabilitiesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Total liabilities	$ 4,372us-gaap_Liabilities / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	$ 4,693us-gaap_Liabilities / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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