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Equity - Summary Status of DSIT Plan (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Number of Options, Outstanding at beginning of year 1,401,658us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,311,397us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Number of Options, Granted at fair value 664,103us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 246,095us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Number of Options, Exercised (33,938)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised [1] (30,316)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised [1]
Number of Options, Forfeited 219,395us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod 125,518us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Number of Options, Outstanding at end of year 1,812,428us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,401,658us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Number of Options, Exercisable at end of year 1,128,434us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber 1,029,507us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Weighted Average Exercise Price, Outstanding at beginning of year $ 5.49us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 5.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted Average Exercise Price, Granted at fair value $ 2.14us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice $ 6.06us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Weighted Average Exercise Price, Exercised $ 2.51us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice [1] $ 3.30us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice [1]
Weighted Average Exercise Price, Forfeited $ 3.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice $ 4.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Weighted Average Exercise Price, Outstanding at end of year $ 4.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 5.49us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted Average Exercise Price, Exercisable at end of year $ 5.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice $ 5.06us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
DSIT Stock Option Plan [Member]    
Number of Options, Outstanding at beginning of year 243,924us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 238,764us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Number of Options, Granted at fair value    6,700us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 [2]
Number of Options, Exercised      
Number of Options, Forfeited (4,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 (1,540)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 [2]
Number of Options, Outstanding at end of year 239,424us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 243,924us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Number of Options, Exercisable at end of year 101,904us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 101,904us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Weighted Average Exercise Price, Outstanding at beginning of year $ 1.78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 $ 1.69us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Weighted Average Exercise Price, Granted at fair value    $ 2.70us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Weighted Average Exercise Price, Exercised      
Weighted Average Exercise Price, Forfeited $ 2.41us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 $ 2.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Weighted Average Exercise Price, Outstanding at end of year $ 1.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 $ 1.78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
Weighted Average Exercise Price, Exercisable at end of year $ 1.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember		 $ 1.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ACFN_DSITStockOptionPlanMember
[1] All shares issued in connection with option exercises were newly issued shares.
[2] * The weighted average exercise price of these grants and forfeitures are NIS 9.38 translated to US dollars using the year end exchange rates (NIS 3.47 and NIS 3.89 for the years ended December 31, 2013 and 2014, respectively)