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Equity - Schedule of Option Grants To Directors and Officers (Details) (USD $)

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Number of shares, Granted

664,103us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

246,095us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

Number of shares, Exercised

(33,938)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised

^[1]

(30,316)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised

^[1]

Number of shares, Forfeited

(219,395)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

(125,518)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

Weighted average exercise price, Granted

$ 2.14us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

$ 6.06us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

Weighted average exercise price, Exercised

$ 2.51us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

^[1]

$ 3.30us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

^[1]

Weighted average exercise price, Forfeited

$ 3.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

$ 4.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

Directors And Officers [Member]

Number of shares, Granted

634,103us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

201,095us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

^[2]

Number of shares, Exercised

33,938us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

30,316us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Number of shares, Forfeited

191,062us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

125,518us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Number of shares, Options held

1,535,428ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriod
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

1,179,658ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriod
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Weighted average exercise price, Granted

$ 2.12us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

$ 5.98us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Weighted average exercise price, Exercised

$ 2.51us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

$ 3.30us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Weighted average exercise price, Forfeited

$ 3.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

$ 4.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

Weighted average exercise price, Options held

$ 4.24ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

$ 5.30ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ACFN_DirectorsAndOfficersMember

[1]	All shares issued in connection with option exercises were newly issued shares.
[2]	* Includes 25,000 options granted to a director of USSI.

X

- Definition

Share Based Compensation Arrangemen tBy Share Based Payment Award Options Held In Period.

+ References

No definition available.

+ Details

Name:	ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriod
Namespace Prefix:	ACFN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share Based Compensation Arrangement ByShare Based Payment Award Options Held In Period Weighted Average Exercise Price.

+ References

No definition available.

+ Details

Name:	ACFN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsHeldInPeriodWeightedAverageExercisePrice
Namespace Prefix:	ACFN_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)-(4)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average price of options that were either forfeited or expired.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)-(4)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of share options (or share units) exercised during the current period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

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



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_TitleOfIndividualAxis=ACFN_DirectorsAndOfficersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: