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Segment Reporting and Geographic Information - Schedule of Long Lived Assets (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Long-lived assets | $ 18,258 us-gaap_NoncurrentAssets | $ 20,789 us-gaap_NoncurrentAssets
United States [Member] |  |
Long-lived assets | 442 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ACFN_UnitedStatesMember | 564 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ACFN_UnitedStatesMember
Israel [Member] |  |
Long-lived assets | $ 638 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ACFN_IsraelMember | $ 582 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = ACFN_IsraelMember

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_StatementGeographicalAxis=ACFN_IsraelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=ACFN_UnitedStatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |