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Equity - Summary of Warrant Activity (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Equity [Abstract]    
Number of shares underlying warrants, Outstanding at beginning of year 285,281us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber 28,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Number of shares underlying warrants, Granted 2,357,142us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted 262,281us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Number of shares underlying warrants, Exercised    (5,750)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
Number of shares underlying warrants, Forfeited Or Expired      
Number of shares underlying warrants, Outstanding and exercisable at end of year 2,642,423ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityExercisable 285,281ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityExercisable
Weighted Average Exercise Price, Outstanding at beginning of year $ 3.18ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionOutstandingWeightedAverageNumberOfShare $ 3.68ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionOutstandingWeightedAverageNumberOfShare
Weighted Average Exercise Price, Granted $ 1.30ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionGrantsInPeriodWeightedAverageExercisePrice $ 3.14ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionGrantsInPeriodWeightedAverageExercisePrice
Weighted Average Exercise Price, Exercised    $ 3.68ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionExercisedInPeriodWeightedAverageExercisePrice
Weighted Average Exercise Price, Forfeited Or Expired      
Weighted Average Exercise Price, Outstanding and exercisable at end of year $ 1.50ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionWeightedAverageExercisable $ 3.18ACFN_ShareBasedCompensationArrangementByShareBasedPaymetAwardNonOptionWeightedAverageExercisable