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Segment Reporting - Reconciliation of Segment Data to Consolidated Statement of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Segment Reporting [Abstract]
Total net loss before income taxes for reportable segments	$ (897)ACFN_NetIncomeLossBeforeIncomeTaxesForReportableSegments		$ (1,584)ACFN_NetIncomeLossBeforeIncomeTaxesForReportableSegments
Other operational segment net income (loss) before income taxes	105ACFN_OtherOperatingSegmentNetIncomeLossBeforeIncomeTaxes		(21)ACFN_OtherOperatingSegmentNetIncomeLossBeforeIncomeTaxes
Total segment net loss before income taxes	(792)ACFN_SegmentNetIncomeLossBeforeIncomeTaxes		(1,605)ACFN_SegmentNetIncomeLossBeforeIncomeTaxes
Unallocated cost of corporate headquarters*	(1,033)ACFN_UnallocatedCorporateSegmentCosts	[1]	(1,043)ACFN_UnallocatedCorporateSegmentCosts	[1]
Unallocated benefit (cost) of DSIT headquarters	10ACFN_UnallocatedDSITsegmentcosts		(26)ACFN_UnallocatedDSITsegmentcosts
Consolidated loss before income taxes	$ (1,815)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments		$ (2,674)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
[1] Includes stock compensation expense of $310 and $208 for the three month periods ended March 31, 2014 and 2015, respectively.

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- Definition

Net income (loss) before income taxes for reportable segments

+ References

No definition available.

+ Details

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- Definition

Other operating segment net income (loss) before income taxes

+ References

No definition available.

+ Details

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X

- Definition

Segment net income (loss) before income taxes

+ References

No definition available.

+ Details

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- Definition

Unallocated corporate segment costs

+ References

No definition available.

+ Details

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Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Unallocated DSIT segment costs

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ 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.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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