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Segment Reporting and Geographic Information - Reconciliation of Segment Data to Consolidated Statement Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Segment Reporting [Abstract] |  |  |
Total assets for reportable segments |  | $ 2,552 | $ 17,765
Total assets of other operational segment |  |  | 441
Assets of discontinued operations |  | 119 | 1,108
Unallocated assets of DSIT headquarters |  |  | 4,367
Unallocated assets of OmniMetrix headquarters |  | 213 | 397
Assets of corporate headquarters | [1] | 6,356 | 252
Total consolidated assets |  | $ 9,240 | $ 24,330
[1] | Includes the investment in DSIT of $5,658 and the escrow deposit of $579 from the DSIT Transaction at December 31, 2016.

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- Definition Assets of corporate headquarters. + References No definition available. + Details
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Balance Type: | debit
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- Definition Assets of discontinued operations. + References No definition available. + Details
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Balance Type: | debit
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- Definition Assets Reportable Segments. + References No definition available. + Details
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Balance Type: | debit
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- Definition Other Assets Operational Segment. + References No definition available. + Details
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Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Unallocated assets of DSIT headquarters. + References No definition available. + Details
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- Definition Unallocated assets of OmniMetrix headquarters. + References No definition available. + Details
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Namespace Prefix: | ACFN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- References No definition available. + Details
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