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EQUITY Dividend Reinvestment Plan (Details) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Equity [Abstract] |
Shares available under dividend reinvestment plan | 600,000
Discount to market price - dividend reinvestment plan | 5.00%

X
- Definition The discount rate from market value on purchase date that participants pay for shares under the dividend reinvestment plan + References No definition available. + Details
Name: | acfn_DiscountToMarketPriceDividendReinvestmentPlan
Namespace Prefix: | acfn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Shares available under dividend reinvestment plan + References No definition available. + Details
Name: | acfn_SharesAvailableUnderDividendReinvestmentPlan
Namespace Prefix: | acfn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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