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Income Taxes - Summary of Tax Loss Carryforwards (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Total	$ 73us-gaap_OperatingLossCarryforwards
Federal [Member]
2022-2034	48,255ACFN_NetOpertingLossCarryforwardsExpirationForStateLocalAndForeign / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Unlimited
Total	48,255us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember	[1]
State [Member]
2022-2034	20,854ACFN_NetOpertingLossCarryforwardsExpirationForStateLocalAndForeign / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Unlimited
Total	20,854us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Foreign [Member]
2022-2034
Unlimited	508ACFN_NetOpertingLossCarryforwardsUnlimitedForStateLocalAndForeign / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Total	$ 508us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
[1] The utilization of a portion of these net operating loss carryforwards is limited to a total of approximately $259 per year due to limits on utilizing the acquired net operating loss carryforwards under Internal Revenue Service regulations following a change in control.

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- Definition

Net Operting Loss Carryforwards Expiration For State Local And Foreign.

+ References

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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