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v3.19.1

Segment Reporting and Geographic Information - Revenues, Accounts Receivable and Unbilled Revenue from Major Customers (Details) - Customer A [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Revenue, Major Customer [Line Items] |  |  |
Major Customer balance | [1] |  |
Major Customer balance percentage | [1] | 0.00% | 0.00%
Accounts Receivable [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Major Customer balance |  | $ 115 | $ 297
Major Customer balance percentage |  | 17.00% | 27.00%
[1] | Balance is not significant

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- Definition Major Customer balance. + References No definition available. + Details
Name: | ACFN_MajorCustomerBalance
Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Major Customer balance percentage. + References No definition available. + Details
Name: | ACFN_MajorCustomerBalancePercentage
Namespace Prefix: | ACFN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_MajorCustomersAxis=ACFN_CustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |