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SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 item | Dec. 31, 2013 | Dec. 31, 2012
SIGNIFICANT ACCOUNTING POLICIES [Abstract] |  |  |
Trade receivables, allowances for doubtful accounts | $ 0 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 20 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent |
Bad debt expense | 0 us-gaap_ProvisionForDoubtfulAccounts | 0 us-gaap_ProvisionForDoubtfulAccounts | 0 us-gaap_ProvisionForDoubtfulAccounts
Additional inventory write-down | 1,005 rdcm_InventoryWriteDownAdditional |  |
Bad debt write offs | 0 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs | 0 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs | 206 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Inventory write offs | 1,815 us-gaap_InventoryWriteDown | 110 us-gaap_InventoryWriteDown | 311 us-gaap_InventoryWriteDown
Shares excluded from the calculation of diluted net income (loss) per share | 1,368,220 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 1,353,372 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 1,248,631 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Uncertain tax position, likelihood of being sustained, threshold for recognition | 50.00%rdcm_DegreeOfLikelihoodOfSustainingUncertainTaxPositionThresholdForRecognitionPercent |  |
Years employment required for eligibility for severance pay | 1 year |  |
Months severance salary payable per year of employment | 1 month |  |
Severance pay expenses | 527 us-gaap_SeveranceCosts1 | 537 us-gaap_SeveranceCosts1 | 588 us-gaap_SeveranceCosts1
Number of suppliers of certain key components | 1 rdcm_NumberOfSuppliersOfCertainKeyComponents |  |
Revenue from contract | 2,205 us-gaap_ConstructionRevenue |  |
Number of contract | 1 rdcm_NumberOfContract |  |
Completion percentage of contract | 78.00%rdcm_CompletionPercentageOfContract |  |
Percentage of marketing expenses for which entity receive grants | 50.00%rdcm_PercentageOfMarketingExpensesForWhichEntityReceivedGrant |  |
Grants received presented as a reduction in marketing expenses | $ 55 us-gaap_RevenueFromGrants | $ 150 us-gaap_RevenueFromGrants | $ 109 us-gaap_RevenueFromGrants

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- Definition Months severance salary payable per year of employment. + References No definition available. + Details
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- Definition Represents percentage of marketing expenses for which entity receive grants. + References No definition available. + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The aggregate revenue from building and real estate development, which may include improvements (such as drainage, utilities, grading and subdividing) to a parcel of land, and general contracting services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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