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Segment Reporting and Geographic Information - Reconciliation of Segment Data to Consolidated Statement Balance Sheet (Details) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Investment in DSIT	$ 5,658
Escrow deposit	$ 579	$ 100

X

- Definition

Escrow Deposit Current.

+ References

No definition available.

+ Details

Name:	ACFN_EscrowDepositCurrent
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Investment in DSIT.

+ References

No definition available.

+ Details

Name:	ACFN_InvestmentInDsit
Namespace Prefix:	ACFN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration