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Finance Expense, Net - Schedule of Finance Income (Expense), Net (Details) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
OmniMetrix Loan and Security Agreement [Member]
Interest expense related to loan	$ 84	$ 31
Loans from Directors [Member]
Interest expense related to loan	$ 6	$ 123

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- Definition

Interest expense related to LT loan.

+ References

No definition available.

+ Details

Name:	ACFN_InterestExpenseRelatedToLtLoan
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_TypeOfArrangementAxis=ACFN_OmniMetrixLoanAndSecurityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TitleOfIndividualAxis=ACFN_LoansFromDirectorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: