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SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 item	Dec. 31, 2013	Dec. 31, 2012
SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Trade receivables, allowances for doubtful accounts	$ 0us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 20us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Bad debt expense	0us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts
Additional inventory write-down	1,005rdcm_InventoryWriteDownAdditional
Bad debt write offs	0us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs	0us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs	206us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Inventory write offs	1,815us-gaap_InventoryWriteDown	110us-gaap_InventoryWriteDown	311us-gaap_InventoryWriteDown
Shares excluded from the calculation of diluted net income (loss) per share	1,368,220us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1,353,372us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1,248,631us-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	527us-gaap_SeveranceCosts1	537us-gaap_SeveranceCosts1	588us-gaap_SeveranceCosts1
Number of suppliers of certain key components	1rdcm_NumberOfSuppliersOfCertainKeyComponents
Revenue from contract	2,205us-gaap_ConstructionRevenue
Number of contract	1rdcm_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	$ 55us-gaap_RevenueFromGrants	$ 150us-gaap_RevenueFromGrants	$ 109us-gaap_RevenueFromGrants

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The minimum degree of likelihood that an uncertain tax position will be sustained that results in recognition of the uncertain tax position, expressed as a percentage.

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Months severance salary payable per year of employment.

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Number of suppliers of certain key components used in the products.

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Years of employment required for eligibility for severance pay.

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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.

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