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ACCRUED SEVERANCE AND SEVERANCE ASSETS Accrued Severance and Severance Assets (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Property, Plant and Equipment [Line Items] |  |  |
Severance pay contributions to dedicated funds | $ 347 | $ 322 | $ 285
Severance pay contributions to funds expected in next fiscal year | $ 380 |  |

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- Definition Severance pay contributions to dedicated funds + References No definition available. + Details
Name: | acfn_SeverancePayContributionsToDedicatedFunds
Namespace Prefix: | acfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Severance pay contributions to funds expected in next fiscal year + References No definition available. + Details
Name: | acfn_SeverancePayContributionsToFundsExpectedInNextFiscalYear
Namespace Prefix: | acfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration