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EQUITY Dividend Reinvestment Plan (Details) In Thousands, unless otherwise specified	12 Months Ended
	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

X

- 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

X

- Details

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