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RELATED PARTY BALANCES AND TRANSACTIONS (Narrative) (Details) In Thousands, unless otherwise specified	1 Months Ended			12 Months Ended						0 Months Ended		1 Months Ended		12 Months Ended
	Apr. 24, 2013 USD ($)	Nov. 30, 2012 USD ($)	Nov. 30, 2012 ILS	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Transactions With Related Parties [Member] USD ($)	Dec. 31, 2013 Transactions With Related Parties [Member] USD ($)	Dec. 31, 2012 Transactions With Related Parties [Member] USD ($)	Apr. 23, 2013 Principal shareholder [Member] USD ($)	Dec. 31, 2014 Principal shareholder [Member]	Jun. 30, 2013 Chairman of the Company's Board of Directors [Member] USD ($)	Jun. 30, 2013 President and Chief Executive Officer [Member] USD ($)	Dec. 31, 2014 Consultant [Member] USD ($)	Dec. 31, 2013 Consultant [Member] USD ($)	Dec. 31, 2012 Consultant [Member] USD ($)
Related Party Transaction [Line Items]
Joint Ownership Percentage of Principal Shareholders Which Are Principal Shareholder of Affiliates											38.00%rdcm_JointOwnershipPercentageOfPrincipalShareholdersWhichArePrincipalShareholderOfAffiliates / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_PrincipalOwnerMember
Aggregate net amounts of lease payments				$ 417us-gaap_RelatedPartyTransactionAmountsOfTransaction	$ 410us-gaap_RelatedPartyTransactionAmountsOfTransaction	$ 438us-gaap_RelatedPartyTransactionAmountsOfTransaction
Related Party Transaction, Expenses from Transactions with Related Party														39us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember	43us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember	37us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember
Loan proceeds from related party		750us-gaap_ProceedsFromRelatedPartyDebt	2,900us-gaap_ProceedsFromRelatedPartyDebt			750us-gaap_ProceedsFromRelatedPartyDebt
Increased in average Israeli Consumer Price Index					1.80%rdcm_IncreasedDecreaseInAverageConsumerPriceIndex	1.60%rdcm_IncreasedDecreaseInAverageConsumerPriceIndex
Financial expenses (income)				(332)us-gaap_NonoperatingIncomeExpense	(291)us-gaap_NonoperatingIncomeExpense	(314)us-gaap_NonoperatingIncomeExpense		27us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember	23us-gaap_NonoperatingIncomeExpense / us-gaap_RelatedPartyTransactionAxis = rdcm_TransactionsWithRelatedPartiesMember
Aggregate purchase price	3,459us-gaap_StockIssuedDuringPeriodValueNewIssues									3,459us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_PrincipalOwnerMember		1,100us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_BoardOfDirectorsChairmanMember	50us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_PresidentAndChiefExecutiveOfficerMember
Aggregate net lease payments														$ 39us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember	$ 43us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember	$ 37us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdcm_ConsultantMember

X

- Definition

Represents the percentage of average Consumer Price Index increase or decrease due to finance income or expenses.

+ References

No definition available.

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X

- Definition

Represents joint ownership percentage of principal shareholders which are also principal shareholders of affiliates.

+ References

No definition available.

+ Details

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Namespace Prefix:	rdcm_
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X

- 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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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

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- Definition

The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

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- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864



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-Name Accounting Standards Codification

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

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-Paragraph 1

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

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-Subparagraph (SX 210.3-04)

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-Name Regulation S-X (SX)

-Number 210

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