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Segment Reporting and Geographic Information - Schedule of Reconciliation of Segment Data to Consolidated Net Loss Before Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting [Abstract] |  |  |
Total net loss before income taxes for reportable segments |  | $ (206) | $ (871)
Other operational segment net loss before income taxes |  |  |
Segment loss before income taxes |  | (206) | (871)
Loss on sale of interest in DSIT, net of transaction costs |  | (607) |
Unallocated net cost of corporate headquarters | [1] | (1,274) | (1,271)
Consolidated net loss before taxes on income |  | $ (1,480) | $ (2,142)
[1] | Includes $26 and $22 of stock compensation expense for the years ended December 31, 2018 and 2017, respectively. Also includes $26 and $107 of interest expense with respect to former director loans for the years ended December 31, 2018 and 2017, respectively.

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- Definition Gain On Sale Of Interest In Dsit Net Of Transaction Costs. + References No definition available. + Details
Name: | ACFN_GainOnSaleOfInterestInDsitNetOfTransactionCosts
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Net income (loss) before income taxes for reportable segments + References No definition available. + Details
Name: | ACFN_NetIncomeLossBeforeIncomeTaxesForReportableSegments
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other operating segment net income (loss) before income taxes + References No definition available. + Details
Name: | ACFN_OtherOperatingSegmentNetIncomeLossBeforeIncomeTaxes
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Segment Net Loss Before Income Taxes. + References No definition available. + Details
Name: | ACFN_SegmentNetLossBeforeIncomeTaxes
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Unallocated net cost of corporate headquarters. + References No definition available. + Details
Name: | ACFN_UnallocatedNetCostOfCorporateHeadquarters
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration