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Restructuring and Related Charges - Summary of Activity Related to Restructuring (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Provision	$ 294us-gaap_RestructuringCharges	$ 1,389us-gaap_RestructuringCharges
GridSense [Member]
Beginning balance	63us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Provision	198us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	594us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Cash payments	(223)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	(340)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Non-cash settlements		(191)ACFN_NoncashSettlementsOfRestructingCharges / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Ending balance	38us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	63us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
GridSense [Member] | Inventory And Fixed Asset Impairements [Member]
Beginning balance
Provision		191us-gaap_RestructuringCharges / us-gaap_PublicUtilitiesInventoryAxis = ACFN_InventoryAndFixedAssetImpairementsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Cash payments
Non-cash settlements		(191)ACFN_NoncashSettlementsOfRestructingCharges / us-gaap_PublicUtilitiesInventoryAxis = ACFN_InventoryAndFixedAssetImpairementsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Ending balance
GridSense [Member] | Other [Member]
Beginning balance
Provision	72us-gaap_RestructuringCharges / us-gaap_PublicUtilitiesInventoryAxis = us-gaap_OtherRestructuringMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Cash payments	(72)us-gaap_PaymentsForRestructuring / us-gaap_PublicUtilitiesInventoryAxis = us-gaap_OtherRestructuringMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Non-cash settlements
Ending balance
GridSense [Member] | Facilities [Member]
Beginning balance
Provision	7us-gaap_RestructuringCharges / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	101us-gaap_RestructuringCharges / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Cash payments	(7)us-gaap_PaymentsForRestructuring / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	(101)us-gaap_PaymentsForRestructuring / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Non-cash settlements
Ending balance
GridSense [Member] | Employee Severance And Termination Benefits [Member]
Beginning balance	63us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Provision	119us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	302us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Cash payments	(144)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	(239)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
Non-cash settlements
Ending balance	38us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember	63us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_GridSenseMember
OmniMetrix technologies [Member] | Inventory And Fixed Asset Impairements [Member]
Beginning balance
Provision		415us-gaap_RestructuringCharges / us-gaap_PublicUtilitiesInventoryAxis = ACFN_InventoryAndFixedAssetImpairementsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Cash payments
Non-cash settlements		(415)ACFN_NoncashSettlementsOfRestructingCharges / us-gaap_PublicUtilitiesInventoryAxis = ACFN_InventoryAndFixedAssetImpairementsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Ending balance
OmniMetrix technologies [Member] | Facilities [Member]
Beginning balance	194us-gaap_RestructuringReserve / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Provision	96us-gaap_RestructuringCharges / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember	202us-gaap_RestructuringCharges / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Cash payments	(42)us-gaap_PaymentsForRestructuring / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember	(8)us-gaap_PaymentsForRestructuring / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Non-cash settlements
Ending balance	248us-gaap_RestructuringReserve / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember	194us-gaap_RestructuringReserve / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ACFN_FacilitiesMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
OmniMetrix technologies [Member] | Employee Severance And Termination Benefits [Member]
Beginning balance	45us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Provision		178us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Cash payments	(45)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember	(133)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
Non-cash settlements
Ending balance		45us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ACFN_EmployeeSeveranceAndTerminationBenefitsMember / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixTechnologiesMember
OmniMetrix [Member]
Beginning balance	239us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember
Provision	96us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember	795us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember
Cash payments	(87)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember	(141)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember
Non-cash settlements		(415)ACFN_NoncashSettlementsOfRestructingCharges / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember
Ending balance	$ 248us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember	$ 239us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ACFN_OmnimetrixMember

X

- Definition

Noncash Settlements Of Restructing Charges.

+ References

No definition available.

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X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

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