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Equity (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended |  |
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Nov. 05, 2014 | Oct. 23, 2013 | Oct. 17, 2013 | Feb. 26, 2013 | Oct. 31, 2013 | Oct. 31, 2011 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Jul. 02, 2013 | Aug. 20, 2013 | Aug. 15, 2012 | Nov. 30, 2014 | Sep. 11, 2012 | Jun. 10, 2010
Common stock, shares issued |  |  |  |  |  |  |  | 26,475,591 us-gaap_SharesIssued |  |  |  |  |  |  |
Common stock, shares outstanding |  |  |  |  |  |  |  | 26,475,591 us-gaap_CommonStockSharesOutstanding |  |  |  |  |  |  |
Equity issuance price per share |  |  |  |  |  |  |  | $ 0.01 us-gaap_SaleOfStockPricePerShare |  |  |  |  |  |  |
Percentage of voting rights |  |  |  |  |  |  |  | 50.00%ACFN_PercentageOfVotingRights |  |  |  |  |  |  |
Gross proceeds from private placements | $ 4,500 us-gaap_ProceedsFromIssuanceOfPrivatePlacement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net of transaction costs | 4,007 ACFN_TransactionCosts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued | 2,142,857 ACFN_WarrantsIssued |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability |  |  |  |  |  |  |  | 50 us-gaap_DerivativeLiabilities |  |  |  |  |  |  |
Risk free interest rate |  |  |  | 1.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate |  |  |  | 2.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate | 1.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate |  |  |  |  |  |
Expected life |  |  |  | 7 years | 5 years |  |  | 7 years | 6 years 8 months 12 days |  |  |  |  |  |
Annual volatility |  |  |  | 57.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate | 62.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate |  |  | 64.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate | 59.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate |  |  |  |  |  |
Annual dividend rate |  |  |  | 2.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate |  |  |  |  | 0.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate |  |  |  |  |  |
Number of stock public offering during period |  | 526,316 us-gaap_StockIssuedDuringPeriodSharesNewIssues | 3,508,771 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from public offering |  | 1,500 us-gaap_ProceedsFromIssuanceInitialPublicOffering | 10,000 us-gaap_ProceedsFromIssuanceInitialPublicOffering |  |  |  |  |  |  |  |  |  |  |  |
Equity issuance price per share |  | $ 2.85 us-gaap_EquityIssuancePerShareAmount | $ 2.85 us-gaap_EquityIssuancePerShareAmount |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds of public offering after deduction of offering expenses |  | 1,370 ACFN_Netproceedsofpublicofferingafterdeductionofofferingexpenses | 9,134 ACFN_Netproceedsofpublicofferingafterdeductionofofferingexpenses |  |  |  |  |  |  |  |  |  |  |  |
Related to exercise price of warrants issued |  | $ 3.14 ACFN_RelatedToExercisePriceOfWarrantsIssuedPricePerShare | $ 3.14 ACFN_RelatedToExercisePriceOfWarrantsIssuedPricePerShare |  |  |  |  |  |  |  |  |  |  |  |
Number of stock issued during period shares dividend reinvestment plan |  |  |  |  |  |  | 18,976 us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan |  | 18,976 us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan |  |  |  |  |  |
Transaction cost |  | 129 ACFN_TransactionCost |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of a quarterly dividend price per share |  |  |  |  |  | $ 0.035 ACFN_PaymentOfQuarterlyDividendPricePerShare |  |  |  |  |  |  |  |  |
Option granted |  |  |  |  |  |  |  | 664,103 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | 246,095 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |  |  |  |  |
Intrinsic value of options exercised |  |  |  |  |  |  |  | 123 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 144 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |  |  |  |
Intrinsic value of options exercisable |  |  |  |  |  |  |  | 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |  |  |  |
Fair value of each option granted |  |  |  | $ 3.17 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  | $ 1.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 3.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 865 us-gaap_AllocatedShareBasedCompensationExpense | 926 us-gaap_AllocatedShareBasedCompensationExpense |  |  |  |  |  |
Employee service share-based compensation nonvested awards total compensation cost not yet recognized |  |  |  |  |  |  |  | 622 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |  |  |  |  |
Weighted average exercise price, Granted |  |  |  |  |  |  |  | $ 2.14 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice | $ 6.06 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice |  |  |  |  |  |
Acorn holding upon conversion of preferred shares |  |  |  |  |  |  |  | 888.30%ACFN_HoldingCompanyUponConversionOfPreferredShares |  |  |  |  |  |  |
Fully diluted acorn holding upon conversion of preferred shares |  |  |  |  |  |  |  | 77.40%ACFN_FullyDilutedHoldingCompanyUponConversionOfPreferredShares |  |  |  |  |  |  |
Warrants granted in connection with November 2014 Capital Raise |  |  |  |  | 262,281 ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsGrantsInPeriod |  |  |  |  |  |  |  |  |  |
Weighted average contractual life of warrants period |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Warrants exercise price per share |  |  |  |  | $ 3.14 ACFN_InvestmentWarrantsExercisePrice |  |  |  |  |  |  |  |  |  |
Value of warrants |  |  |  |  | 482 us-gaap_WarrantsAndRightsOutstanding |  |  | 1,641 us-gaap_WarrantsAndRightsOutstanding | 526 us-gaap_WarrantsAndRightsOutstanding |  |  |  |  |  |
Discount rate |  |  |  |  | 1.40%ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDiscountRate |  |  |  |  |  |  |  |  |  |
Warrants exercised |  |  |  |  |  |  |  |  | 5,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised |  |  |  |  |  |
Warrants forfeited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price, Granted |  |  |  |  |  |  |  | $ 9.38 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_CurrencyAxis = ACFN_NisMember |  |  |  |  |  |  |
Weighted average exercise price of forfeitures |  |  |  |  |  |  |  | $ 9.38 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_CurrencyAxis = ACFN_NisMember |  |  |  |  |  |  |
DSIT Solutions, Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock description |  |  |  |  |  |  |  |  | If all the options in the DSIT Plan are exercised, the Company’s holdings in DSIT will be diluted from 88.3% to approximately 77.4% on an as converted basis (see Note 3(d)). |  |  |  |  |  |
Option granted |  |  |  |  |  |  |  |  | 6,700 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  |  | 160 us-gaap_AllocatedShareBasedCompensationExpense / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  |
Option exercisable period |  |  |  |  |  |  |  |  | 5 years 1 month 6 days |  |  |  |  |  |
Grantee achieving period |  |  |  |  |  |  |  |  |  | 25 years |  |  |  |  |
DSIT Solutions, Ltd. [Member] | NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price, Granted |  |  |  |  |  |  |  |  | $ 9.38 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_CurrencyAxis = ACFN_NisMember / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  |
Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 830 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | 927 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |  |  |  |  |
Research and Development Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 35 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember |  |  |  |  |  |  |
Non-Employee Options [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 37 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_NonEmployeeOptionsMember | 42 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_NonEmployeeOptionsMember |  |  |  |  |  |
Employee And Non Employee Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period of Options outstanding |  |  |  |  |  |  |  | 1 year 4 months 24 days |  |  |  |  |  |  |
USSI Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 79 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember | 133 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember |  |  |  |  |  |
USSI Stock Option Plan [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 53 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember | 92 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember |  |  |  |  |  |
USSI Stock Option Plan [Member] | Research and Development Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 26 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember | 41 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember |  |  |  |  |  |
Outside Consultant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  |  |  |  |  | 2.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_OutsideConsultantMember |  |  |  |
Expected life |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |
Annual volatility |  |  |  |  |  |  |  |  |  |  | 57.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_OutsideConsultantMember |  |  |  |
Annual dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option granted |  |  |  | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_OutsideConsultantMember |  |  |  |  |  |  | 20,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_OutsideConsultantMember |  |  |  |
Option excercise price per share |  |  |  | $ 6.84 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_OutsideConsultantMember |  |  |  |  |  |  |  |  |  |  |
DSIT [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  |  | 116 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_DsitMember |  |  |  |  |  |
DSIT [Member] | Cost of Sales [Memebr] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense |  |  |  |  |  |  |  | 2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_DsitMember | 44 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_DsitMember |  |  |  |  |  |
Dividend Reinvestment Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares available under DRIP |  |  |  |  |  |  |  |  |  |  |  | 600,000 ACFN_SharesAvailableUnderDrip / us-gaap_PlanNameAxis = ACFN_DividendReinvestmentPlanMember |  |  |
Percentage of shares issued discount from market price |  |  |  |  |  |  |  |  |  |  |  | 5.00%ACFN_PercentageOfSharesIssuedDiscountFromMarketPrice / us-gaap_PlanNameAxis = ACFN_DividendReinvestmentPlanMember |  |  |
2006 Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase number of shares available |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = ACFN_TwoThousandSixStockincentivePlanMember |
2006 Restated Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option granted |  |  |  |  |  |  |  | 1,122,072 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = ACFN_TwoThousandSixRestatedStockIncentivePlanMember |  |  |  |  |  |  |
2006 Director Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option granted |  |  |  |  |  |  |  | 55,140 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = ACFN_TwoThousandSixDirectorPlanMember |  |  |  |  |  |  |
USSI 2012 Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase number of shares available |  |  |  |  |  |  |  | 1,180,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = ACFN_USSITwoThousandTwleveStockOptionPlanMember |  |  |  |  |  |  |
Conversion of stock description |  |  |  |  |  |  |  | The options vest over a three to four year period based on date of hire or other benchmark specified in the option agreement. Upon exercise of all the options in the Plan, the Company’s holdings in USSI will be diluted from 95.7% (on an as converted basis) to approximately 88.4% (see Note 3(b)) |  |  |  |  |  |  |
Option granted |  |  |  |  |  |  |  |  | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = ACFN_USSITwoThousandTwleveStockOptionPlanMember |  |  |  |  |  |
Weighted average period of Options outstanding |  |  |  |  |  |  |  | 4 years 8 months 12 days | 5 years 8 months 12 days |  |  |  |  |  |
Weighted average exercise price, Granted |  |  |  |  |  |  |  |  | $ 1.72 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = ACFN_USSITwoThousandTwleveStockOptionPlanMember |  |  |  |  |  |
Weighted average exercise price of forfeitures |  |  |  |  |  |  |  | $ 1.72 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = ACFN_USSITwoThousandTwleveStockOptionPlanMember | $ 1.72 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = ACFN_USSITwoThousandTwleveStockOptionPlanMember |  |  |  |  |  |
Option exercisable period |  |  |  |  |  |  |  | 4 years 8 months 12 days | 5 years 8 months 12 days |  |  |  |  |  |
Placement Agent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued | 214,285 ACFN_WarrantsIssued / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants conversion into stock price per share | $ 1.26 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected life |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Annual volatility |  |  |  |  |  |  |  |  |  |  |  |  | 62.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |
Annual dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants granted in connection with November 2014 Capital Raise |  |  |  |  |  |  |  |  |  |  |  |  | 214,285 ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsGrantsInPeriod / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |
Weighted average contractual life of warrants period |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Warrants exercise price per share |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.26 ACFN_InvestmentWarrantsExercisePrice / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |
Value of warrants |  |  |  |  |  |  |  |  |  |  |  |  | 97 us-gaap_WarrantsAndRightsOutstanding / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |
Discount rate |  |  |  |  |  |  |  |  |  |  |  |  | 1.60%ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDiscountRate / us-gaap_SubsidiarySaleOfStockAxis = ACFN_PlacementAgentMember |  |
Unregistered Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | 4,285,714 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = ACFN_UnregisteredSharesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, per share | $ 1.05 us-gaap_SharesIssuedPricePerShare / us-gaap_StatementEquityComponentsAxis = ACFN_UnregisteredSharesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants conversion into stock price per share | $ 1.30 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_StatementEquityComponentsAxis = ACFN_UnregisteredSharesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected life |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |  |  |
Annual volatility |  |  |  |  |  |  |  | 63.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |
Annual dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants granted in connection with November 2014 Capital Raise |  |  |  |  |  |  |  | 2,142,847 ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsGrantsInPeriod / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |
Weighted average contractual life of warrants period |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |  |  |
Warrants exercise price per share |  |  |  |  |  |  |  | $ 1.30 ACFN_InvestmentWarrantsExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |
Value of warrants |  |  |  |  |  |  |  | $ 1,018 us-gaap_WarrantsAndRightsOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  | 1.60%ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDiscountRate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |
Warrants exercised |  |  |  |  |  |  |  |  | 2,954 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |
Warrants forfeited |  |  |  |  |  |  |  |  | 2,796 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |
Derivative Liability [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 1.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_DebtInstrumentAxis = ACFN_DerivativeLiabilityMember |  |
Expected life |  |  |  |  |  |  |  |  |  |  |  |  | 3 years 3 months 18 days |  |
Annual volatility |  |  |  |  |  |  |  |  |  |  |  |  | 70.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = ACFN_DerivativeLiabilityMember |  |
Annual dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of capital stock authorized |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000,000 us-gaap_CapitalUnitsAuthorized / us-gaap_RangeAxis = us-gaap_MinimumMember
Minimum [Member] | USSI Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fully diluted acorn holding upon conversion of preferred shares |  |  |  |  |  |  |  | 88.40%ACFN_FullyDilutedHoldingCompanyUponConversionOfPreferredShares / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Option vested period |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of capital stock authorized |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 us-gaap_CapitalUnitsAuthorized / us-gaap_RangeAxis = us-gaap_MaximumMember
Maximum [Member] | USSI Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acorn holding upon conversion of preferred shares |  |  |  |  |  |  |  | 95.70%ACFN_HoldingCompanyUponConversionOfPreferredShares / us-gaap_OptionIndexedToIssuersEquityTypeAxis = ACFN_USSIStockOptionPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Option vested period |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |
Maximum [Member] | 2006 Stock Incentive Plan [Member] | Non-Employee Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase number of shares available |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = ACFN_TwoThousandSixStockincentivePlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ACFN_NonEmployeeDirectorsMember |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Number of authorized capital units or capital shares. This element is relevant to issuers of face-amount certificates and registered investment companies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition A unique description of a noncash or part noncash stock conversion. The description would be expected to include sufficient information to provide an understanding of the nature and purpose of the conversion. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount per share or per unit assigned to the consideration received of equity securities issued for development stage entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 915 -SubTopic 215 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6472370&loc=d3e38297-110927 + Details
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements that were either cancelled or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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