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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
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Revenues	$ 23,636us-gaap_Revenues	$ 20,482us-gaap_Revenues	$ 15,786us-gaap_Revenues
Expenses:
Cost of sales	8,693us-gaap_CostOfRevenue	7,890us-gaap_CostOfRevenue	6,182us-gaap_CostOfRevenue
Operating expenses:
Research and development	5,812us-gaap_ResearchAndDevelopmentExpense	5,615us-gaap_ResearchAndDevelopmentExpense	6,102us-gaap_ResearchAndDevelopmentExpense
Sales and marketing	7,295us-gaap_SellingAndMarketingExpense	7,592us-gaap_SellingAndMarketingExpense	8,515us-gaap_SellingAndMarketingExpense
General and administrative	2,262us-gaap_GeneralAndAdministrativeExpense	2,051us-gaap_GeneralAndAdministrativeExpense	2,107us-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	19us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	403us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	451us-gaap_Revenues / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Expenses:
Cost of sales	56us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	54us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	66us-gaap_CostOfRevenue / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Operating expenses:
Research and development	249us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	208us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	198us-gaap_ResearchAndDevelopmentExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Sales and marketing	125us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	126us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	181us-gaap_SellingAndMarketingExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
General and administrative	60us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	53us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	57us-gaap_GeneralAndAdministrativeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Financial expenses (income)		$ 27us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	$ 23us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember

X

- 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



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

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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)

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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)

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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



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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



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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.

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