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RELATED PARTY BALANCES AND TRANSACTIONS (Schedule of Transactions with Related Parties) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Related Party Transaction [Line Items] |  |  |
Revenues | $ 23,636 us-gaap_Revenues | $ 20,482 us-gaap_Revenues | $ 15,786 us-gaap_Revenues
Expenses: |  |  |
Cost of sales | 8,693 us-gaap_CostOfRevenue | 7,890 us-gaap_CostOfRevenue | 6,182 us-gaap_CostOfRevenue
Operating expenses: |  |  |
Research and development | 5,812 us-gaap_ResearchAndDevelopmentExpense | 5,615 us-gaap_ResearchAndDevelopmentExpense | 6,102 us-gaap_ResearchAndDevelopmentExpense
Sales and marketing | 7,295 us-gaap_SellingAndMarketingExpense | 7,592 us-gaap_SellingAndMarketingExpense | 8,515 us-gaap_SellingAndMarketingExpense
General and administrative | 2,262 us-gaap_GeneralAndAdministrativeExpense | 2,051 us-gaap_GeneralAndAdministrativeExpense | 2,107 us-gaap_GeneralAndAdministrativeExpense
Financial expenses (income) | (332)us-gaap_NonoperatingIncomeExpense | (291)us-gaap_NonoperatingIncomeExpense | (314)us-gaap_NonoperatingIncomeExpense
Transactions With Related Parties [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Revenues | 19 us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 403 us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 451 us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Expenses: |  |  |
Cost of sales | 56 us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 54 us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 66 us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Operating expenses: |  |  |
Research and development | 249 us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 208 us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 198 us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Sales and marketing | 125 us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 126 us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 181 us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
General and administrative | 60 us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 53 us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | 57 us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Financial expenses (income) |  | $ 27 us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember | $ 23 us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember

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- Definition The aggregate cost of goods produced and sold and services rendered 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 210.5-03.2) -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 2 -Article 5 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + 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 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + 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 210.5-03.7) -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 7 -Article 5 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + 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) -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 The aggregate total amount of expenses directly related to the marketing or selling of products or services. + References No definition available. + Details
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