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Goodwill and Intangible Assets (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Weighted average estimated useful lives in years 11 years 1 month 6 days  
Amortization Expense $ 47ACFN_AmortizationExpense $ 70ACFN_AmortizationExpense
Amortization expense of intangible assets, 2016 185us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
Amortization expense of intangible assets, 2017 185us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
Amortization expense of intangible assets, 2018 185us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
Amortization expense of intangible assets, 2019 185us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Amortization expense of intangible assets, 2020 $ 185us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive