Aggregate Royalty Sales Percentage.

No definition available.

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- Definition

Guarantees

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Guarantees Expiration Periods.

+ References

No definition available.

+ Details

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- Definition

License term.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Operating Loss Carryforwards Expiration Date1.

+ References

No definition available.

+ Details

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- Definition

Percentage Of Gross Sales On Commercial Product.

+ References

No definition available.

+ Details

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Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of representing participation in DSIT's expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage On Extended Repayment Period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ACFN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of BIRD Foundation funding

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Proceeds From Research And Development.

+ References

No definition available.

+ Details

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

- Definition

Project Sale Of Project.

+ References

No definition available.

+ Details

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

- Definition

Value Of Grants Awarded.

+ References

No definition available.

+ Details

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

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Costs incurred and are directly related to generating license revenue. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

+ References

+ Details

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- Definition

The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Commitments and Contingencies (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended		1 Months Ended				12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Apr. 30, 2012	Jun. 30, 2012	Jul. 31, 2014	Sep. 30, 2013	Dec. 31, 2014
Office rental and automobile leasing expenses	$ 1,103us-gaap_LeaseAndRentalExpense	$ 1,239us-gaap_LeaseAndRentalExpense
Operating leases expiration dates	leases will expire on different dates from 2016 to 2020 for continuing operations and from 2016 to 2017 for discontinued operations.
Guarantees	3,335ACFN_Guarantees						3,335ACFN_Guarantees
Guarantees expiration period	expire on different dates from 2015 to 2017.
Guarantees deposited with israeli bank	1,117						1,117
Current restricted deposits	467						467
Non current restricted deposits	650						650
Proceeds from research and development from BIRD foundation	201ACFN_ProceedsFromResearchAndDevelopment	180ACFN_ProceedsFromResearchAndDevelopment
Percentage of gross sales on commercial product	5.00%
Percentage on extended repayment period	5.00%
Royalty amount	0us-gaap_RoyaltyExpense	25us-gaap_RoyaltyExpense
Northrop Grumman Guidance And Electronics Company [Member]
License amount			150
Percentage on aggregate royalty sales			10.00%
Royalty amount			50
License term			10 years
Repayment Period Two Years [Member]
Percentage on extended repayment period	113.00%
Repayment Period Three Years [Member]
Percentage on extended repayment period	125.00%
Repayment Period Four Years [Member]
Percentage on extended repayment period	138.00%
Repayment Period Five Years [Member]
Percentage on extended repayment period	150.00%
Binational Industrial Research And Development [Member]
Value of joint grants				900
Period of BIRD Foundation				24 months
DSIT [Member]
Proceeds from research and development from BIRD foundation	126	113
Amount stage of grant for DSIT expenses						325
Percentage of representing participation in DSIT's expenses					50.00%	50.00%
Grant for received DSIT value					245	275
USSI [Member]
Proceeds from research and development from BIRD foundation	75	67
License amount			150
Percentage on aggregate royalty sales			10.00%
Royalty amount			50
GridSense [Member]
Project sale of project							100
GridSense [Member] \| Minimum [Member]
Percentage on aggregate royalty sales	1.50%
GridSense [Member] \| Maximum [Member]
Percentage on aggregate royalty sales	6.00%
Discontinued Operations [Member]
Office rental and automobile leasing expenses	$ 237	$ 260