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Discontinued Operations - Schedule of Assets and Liabilities Related to Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash and cash equivalents	$ 4,821us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 16,531us-gaap_CashAndCashEquivalentsAtCarryingValue
Inventory	1,374us-gaap_InventoryNet	2,261us-gaap_InventoryNet
Other current assets	1,813us-gaap_OtherAssetsCurrent	1,546us-gaap_OtherAssetsCurrent
Total current assets	21,410us-gaap_AssetsCurrent	35,951us-gaap_AssetsCurrent
Property and equipment, net	1,080us-gaap_PropertyPlantAndEquipmentNet	1,146us-gaap_PropertyPlantAndEquipmentNet
Goodwill	1,031us-gaap_Goodwill	3,027us-gaap_Goodwill
Total assets	29,543us-gaap_Assets	50,956us-gaap_Assets
Accounts payable	2,187us-gaap_AccountsPayableCurrent	1,945us-gaap_AccountsPayableCurrent
Other current liabilities	3,028us-gaap_OtherLiabilitiesCurrent	3,136us-gaap_OtherLiabilitiesCurrent
USSI [Member] | Discontinued Operations [Member]
Cash and cash equivalents	52us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	748us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Inventory		2,279us-gaap_InventoryNet / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Other current assets	91us-gaap_OtherAssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	149us-gaap_OtherAssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Total current assets	143us-gaap_AssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	3,176us-gaap_AssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Property and equipment, net		1,286us-gaap_PropertyPlantAndEquipmentNet / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Intangible assets, net		2,184us-gaap_IntangibleAssetsCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Goodwill		1,402us-gaap_Goodwill / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Other assets		33us-gaap_OtherAssets / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Total assets	143us-gaap_Assets / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	8,081us-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	1,160us-gaap_ShortTermBankLoansAndNotesPayable / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Accounts payable	1,006us-gaap_AccountsPayableCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	1,141us-gaap_AccountsPayableCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Accrued payroll, payroll taxes and social benefits	346us-gaap_AccruedPayrollTaxesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	499us-gaap_AccruedPayrollTaxesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Other current liabilities	1,881us-gaap_OtherLiabilitiesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	1,090us-gaap_OtherLiabilitiesCurrent / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Total liabilities	$ 4,693us-gaap_Liabilities / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember	$ 3,890us-gaap_Liabilities / us-gaap_CreditFacilityAxis = ACFN_USSIMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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