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Segment Reporting and Geographic Information - Reconciliation of Segment Data to Consolidated Statement Balance Sheet (Details) (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Segment Reporting [Abstract] |  |
Unrestricted cash | $ 84 | $ 4,672

X
- Definition Unrestricted cash. + References No definition available. + Details
Name: | ACFN_UnrestrictedCash
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration