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Investments in Subsidiaries (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 0 Months Ended | 1 Months Ended | 5 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended |  |
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Dec. 31, 2013 | Dec. 19, 2013 | Aug. 21, 2013 | May 31, 2013 | Feb. 28, 2013 | Aug. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2014 | Jul. 02, 2013 | Dec. 31, 2014 | Nov. 30, 2014
Revenues from product line | $ 152 ACFN_RevenuesFromProductLine |  |  |  |  |  |  |  |  |  |  |
GridSense [Member] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of product line |  | 281 ACFN_ProceedsFromSaleOfProductLine / us-gaap_BusinessAcquisitionAxis = ACFN_GridSenseMember |  |  |  |  |  |  |  |  |  |
Gain on sale of product line |  | 116 us-gaap_GainLossOnSaleOfOtherInvestments / us-gaap_BusinessAcquisitionAxis = ACFN_GridSenseMember |  |  |  |  |  |  |  |  |  |
U.S. Seismic Systems, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Common stock owned |  |  |  |  |  | 9,376,401 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  |
Percentage of conversion stock |  |  |  |  |  | 95.70%ACFN_PercentageOfConversionStock / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  |
Percentage fully diluted ownership |  |  |  |  |  | 88.40%ACFN_FullyDilutedOwnershipPercentage / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  |
Payment of preferred stock |  |  | 1,000 ACFN_PaymentOfPreferredStock / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember | 2,500 ACFN_PaymentOfPreferredStock / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember | 2,500 ACFN_PaymentOfPreferredStock / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  |  |
Invested in common shares |  |  |  |  |  |  | 7,584 ACFN_InvestedInCommonShares / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |
Cash investment | 5,355 ACFN_CashInvestment / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  | 5,355 ACFN_CashInvestment / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |
Acorn common shares |  |  |  |  |  |  | 2,229 ACFN_CommonSharesInvestment / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |
Additional purchase value of preferred stock |  |  |  |  |  |  | 16,750 ACFN_AdditionalPurchaseValueOfPreferredStock / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |
Lent additional loan | 1,355 us-gaap_ShortTermBorrowings / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  |  |  | 1,355 us-gaap_ShortTermBorrowings / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |  |  |  | 10,058 us-gaap_ShortTermBorrowings / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |
Loan bears interest rate |  |  |  |  |  |  |  |  |  |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember |
U.S. Seismic Systems, Inc [Member] | Secured Promissory Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loan bears interest rate |  |  |  |  |  |  |  |  |  |  |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember
Processing service value |  |  |  |  |  |  |  |  |  |  |  | 240 ACFN_ProcessingServiceInvestmentValue / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember
U.S. Seismic Systems, Inc [Member] | Series A 1 Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Common stock owned |  |  |  |  |  |  |  | 4,208,745 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementEquityComponentsAxis = ACFN_SeriesAOnePreferredStockMember |  |  |  |
Common stock representing shares |  |  |  |  |  |  |  | 6,017,690 ACFN_CommonStockRepresentingShares / dei_LegalEntityAxis = ACFN_USSeismicSystemsIncMember / us-gaap_StatementEquityComponentsAxis = ACFN_SeriesAOnePreferredStockMember |  |  |  |
Acorn [Member] | Secured Promissory Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loan bears interest rate |  |  |  |  |  |  |  |  |  |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_AcornMember |
Provision for secured promissory note |  |  |  |  |  |  |  |  | 640 ACFN_ProvisionForSecuredPromissoryNote / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_AcornMember |  |  |
Secured promissory note lent to channel partner |  |  |  |  |  |  |  |  | 640 ACFN_SecuredPromissoryNoteLentToRelatedParties / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_AcornMember |  |  |
Provision for secured promissory note interest accrued |  |  |  |  |  |  |  |  | 9 ACFN_ProvisionForSecuredPromissoryNoteInterestAccrued / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_AcornMember |  |  |
Received cash from the partner |  |  |  |  |  |  |  |  |  |  |  | 400 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / us-gaap_DebtInstrumentAxis = ACFN_SecuredPromissoryNotesMember / dei_LegalEntityAxis = ACFN_AcornMember
DSIT Solutions, Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Additional purchase value of preferred stock | 1,400 ACFN_AdditionalPurchaseValueOfPreferredStock / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  |  |  |  | 800 ACFN_AdditionalPurchaseValueOfPreferredStock / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |
Adjustments of non controlling interests | 202 ACFN_AdjustmentsOfNonControllingInterests / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  |  |  |  |  |  |
Converted prior loan |  |  |  |  |  |  |  |  |  | 800 us-gaap_ConversionOfStockAmountConverted1 / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |
Converted advances and loans |  |  |  |  |  |  |  |  |  | 2,800 ACFN_ConvertedAdvancesAndLoans / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |
Fund payment of remaining | $ 1,400 ACFN_FundPaymentOfRemaining / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  | $ 1,400 ACFN_FundPaymentOfRemaining / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |
Percentage of ownership |  |  |  |  |  |  |  |  |  |  | 88.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |
Percentage of ownership diluted | 77.40%ACFN_PercentageOfOwnershipDiluted / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |  | 77.40%ACFN_PercentageOfOwnershipDiluted / dei_LegalEntityAxis = ACFN_DSITSolutionsLtdMember |  |  |  |  |

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- Definition Processing Service Investment Value. + References No definition available. + Details
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- Definition Provision For Secured Promissory Note. + References No definition available. + Details
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- Definition The value of the stock converted in a noncash (or part noncash) transaction. 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 difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 + Details
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