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Segment Reporting and Geographic Information - Revenues, Accounts Receivable and Unbilled Revenue from Major Customers (Details) - Customer A [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Major Customer balance	[1]
Major Customer balance percentage	[1]	0.00%	0.00%
Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Major Customer balance		$ 115	$ 297
Major Customer balance percentage		17.00%	27.00%
[1] Balance is not significant

X

- Definition

Major Customer balance.

+ References

No definition available.

+ Details

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

X

- Definition

Major Customer balance percentage.

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_MajorCustomersAxis=ACFN_CustomerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: