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Finance Income (Expense), Net - Schedule of Finance Income (Expense), Net (Details) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans from Directors [Member]
Interest expense related to Leap Tide loan	$ 123	$ 56
LT Loan [Member]
Interest expense related to Leap Tide loan		$ 446

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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

X

- Details

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

X

- Details

Name:	dei_LegalEntityAxis=ACFN_LTLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: