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Segment Reporting and Geographic Information - Reconciliation of Segment Assets - Other Significant Items (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Depreciation and amortization | $ 648 us-gaap_DepreciationDepletionAndAmortization | $ 1,072 us-gaap_DepreciationDepletionAndAmortization
Expenditures for assets | 393 us-gaap_PaymentsToAcquireProductiveAssets | 1,468 us-gaap_PaymentsToAcquireProductiveAssets
Segment Total [Member] |  |
Depreciation and amortization | 646 us-gaap_DepreciationDepletionAndAmortization / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_SegmentTotalMember | 1,053 us-gaap_DepreciationDepletionAndAmortization / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_SegmentTotalMember
Expenditures for assets | 328 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_SegmentTotalMember | 1,392 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_SegmentTotalMember
Adjustments [Member] |  |
Depreciation and amortization | 2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_AdjustmentsMember | 19 us-gaap_DepreciationDepletionAndAmortization / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_AdjustmentsMember
Expenditures for assets | $ 65 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_AdjustmentsMember | $ 76 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_SubsegmentsConsolidationItemsAxis = ACFN_AdjustmentsMember

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Details
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- Details
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