Availability under loan and security agreement.

No definition available.

Name:	ACFN_AvailabilityUnderLoanAndSecurityAgreement
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loan balance under loan and security agreement.

+ References

No definition available.

+ Details

Name:	ACFN_LoanBalanceUnderLoanAndSecurityAgreement
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum financing of account receivable formula-based agreement

+ References

No definition available.

+ Details

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

- Definition

Minimum loan balance.

+ References

No definition available.

+ Details

Name:	ACFN_MinimumLoanBalance
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of all eligible invoices

+ References

No definition available.

+ Details

Name:	ACFN_PercentageOfAllEligibleInvoices
Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible hardware invoices.

+ References

No definition available.

+ Details

Name:	ACFN_PercentageOfEligibleHardwareInvoices
Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible monitoring invoices.

+ References

No definition available.

+ Details

Name:	ACFN_PercentageOfEligibleMonitoringInvoices
Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

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

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Debt (Details Narrative) - Omni Metrix [Member] - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Oct. 31, 2017	Sep. 30, 2016	Feb. 29, 2016	Dec. 31, 2017	Dec. 31, 2016
Loan balance under loan and security agreement				$ 313	$ 376
Loan and Security Agreement [Member]
Maximum financing of account receivable formula-based agreement	$ 1,000		$ 500
Debt interest rate description	The greater of prime (4.50% at December 31, 2017) plus 2% or 6% per year
Percentage of monthly service charge	0.90%	1.00%	1.125%
Debt effective interest rate				17.30%	19.50%
Percentage of eligible hardware invoices			80.00%
Percentage of eligible monitoring invoices			40.00%
Percentage of all eligible invoices	75.00%	75.00%
Minimum loan balance	$ 150
Loan and Security Agreement [Member] \| Minimum [Member]
Minimum loan balance		$ 150
Loan and Security Agreement [Member] \| Prime Rate [Member]
Debt interest rate description				The greater of prime (3.75% at December 31, 2016) plus 2% or 6% per year.
custom:AvailabilityUnderLoanandSecurityAgreementMember
Availability under loan and security agreement				$ 182