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Commitments and Contingencies (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Office rental and automobile leasing expenses | $ 245 | $ 638
Operating leases expiration dates | leases will expire on different dates from 2017 to 2019. |
DSIT [Member] |  |
Office rental and automobile leasing expenses | $ 179 | 528
Discontinued Operations [Member] |  |
Office rental and automobile leasing expenses | $ 67 | $ 158

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- Definition Operating leases expiration dates. + References No definition available. + Details
Name: | ACFN_OperatingLeasesExpirationDates
Namespace Prefix: | ACFN_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_CreditFacilityAxis=ACFN_DsitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=us-gaap_SegmentDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |