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Subsequent Events (Details Narrative) - Subsequent Event [Member] - Rafael Advanced Defense Systems LTD [Member] $ in Thousands	Oct. 31, 2017 USD ($)
Escrow fund, gross	$ 579
Escrow fund tax withholding	$ 41

X

- Definition

Escrow fund, gross.

+ References

No definition available.

+ Details

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

X

- Definition

Escrow fund tax withheld.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=ACFN_RafaelAdvancedDefenseSystemsLTDMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: