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Other Current Assets - Schedule of Other Current Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid expense and deposits $ 492us-gaap_PrepaidExpenseAndOtherAssetsCurrent $ 508us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Deferred costs 549us-gaap_DeferredCostsCurrent 424us-gaap_DeferredCostsCurrent
Deferred taxes 192us-gaap_DeferredTaxAssetsNetCurrent 138us-gaap_DeferredTaxAssetsNetCurrent
Funded severance assets 203ACFN_SeveranceAssetCurrent 137ACFN_SeveranceAssetCurrent
Employee advances 105us-gaap_DueFromEmployeesCurrent 150us-gaap_DueFromEmployeesCurrent
Other receivables 272us-gaap_OtherReceivablesNetCurrent 189us-gaap_OtherReceivablesNetCurrent
Other current assets $ 1,813us-gaap_OtherAssetsCurrent $ 1,546us-gaap_OtherAssetsCurrent