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GOODWILL AND INTANGIBLE ASSETS Impairment of intangible (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract] |
Impairment of intangible assets - finite lived - PG segment Q3 2013 | $ 2,708
Impairment of intangible assets - finite lived - CP segment Q3 2013 | 977
Impairment of Intangible Assets, Finite-lived | $ 1,116

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- Definition Impairment of intangible assets - finite lived - CP segment Q3 2013 + References No definition available. + Details
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Namespace Prefix: | acfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Impairment of intangible assets - finite lived - PG segment Q2 2013 + References No definition available. + Details
Name: | acfn_ImpairmentofintangibleassetsfinitelivedPGsegmentQ22013
Namespace Prefix: | acfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Impairment of intangible assets - finite lived - PG segment Q3 2013 + References No definition available. + Details
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Namespace Prefix: | acfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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