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SHAREHOLDERS' EQUITY (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 02, 2015 | Apr. 24, 2013 | Dec. 31, 2014 | Feb. 28, 2015 | Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Shares held by subsidiary |  |  | 5,189 rdcm_SubsidiaryShareholderSharesOwned |  | 5,189 rdcm_SubsidiaryShareholderSharesOwned
Treasury stock, shares |  |  | 30,843 us-gaap_TreasuryStockShares |  | 30,843 us-gaap_TreasuryStockShares
Shares issued |  | 1,239,639 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |
Aggregate purchase price |  | $ 3,459 us-gaap_StockIssuedDuringPeriodValueNewIssues |  |  |
Purchase price per share |  | $ 2.79 us-gaap_EquityIssuancePerShareAmount |  |  |
Stock issuance costs |  | 35 us-gaap_PaymentsOfStockIssuanceCosts |  |  |
Ratio of common shares sold to warrants issued |  | 3 rdcm_CommonSharesSoldToIssueOneWarrant |  |  |
Maximum number of shares callable by warrants |  | 413,213 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights |  |  |
Exercise price of warrants |  | $ 3.49 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  |  |
Exercise of options, shares |  |  | 79,307 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |  |
Period before expiration |  | 3 years | 7 years |  |
In-the-money options outstanding |  |  | 721,475 rdcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardInMoneyOptionsOutstandingNumber |  |
Out of the money options outstanding |  |  | 44,650 rdcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOutOfMoneyOptionsOutstandingNumber |  |
In-the-money options exercisable |  |  | 544,225 rdcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardInMoneyOptionsExercisableNumber |  |
Out of the money options exercisable |  |  | 44,300 rdcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOutOfMoneyOptionsExercisableNumber |  |
Number of shares available for future grants |  |  | 24,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |
Exercise price, minimum range |  |  | $ 5.25 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit |  |
Exercise price, maximum range |  |  | $ 8.60 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit |  |
Vesting period for plan | 1 year |  | 1 year |  |
Unrecognized balance of compensation expenses |  |  | $ 220 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |
Period over which total unrecognized cost related to non-vested share based compensation expected to be recognized |  |  | 2 years |  |
Subsequent event [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Additional options for future grants authorized |  |  |  | 250,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Minimum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period for plan |  |  | 0 years |  |
Maximum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period for plan |  |  | 4 years |  |

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- Definition The period of time an option award is exercisable, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of shares into which in-the-money fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References No definition available. + Details
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- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding and in-the-money as of the balance sheet date, including vested options. + References No definition available. + Details
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- Definition The number of shares into which out of the money fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount per share or per unit assigned to the consideration received of equity securities issued for development stage entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 915 -SubTopic 215 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6472370&loc=d3e38297-110927 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of new stock issued during the period. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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