Increase for accrued, but unpaid interest on grants for the period.

No definition available.

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Namespace Prefix:	rdcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the maximum length of the contractual obligation to pay royalites.

+ References

No definition available.

+ Details

Name:	rdcm_MaximumTermRoyaltyPayments
Namespace Prefix:	rdcm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Royalties fees as a percentage of revenues from products developed from research and development and marketing projects financed.

+ References

No definition available.

+ Details

Name:	rdcm_PercentageOfRevenueRoyalties
Namespace Prefix:	rdcm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percent of dollar-linked amounts of the grants received required to be paid in royalties.

+ References

No definition available.

+ Details

Name:	rdcm_RequiredPercentageOfDollarLinkedAmountsOfGrantsReceived
Namespace Prefix:	rdcm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount payable in royalties based upon the original grant amount times a stated multiplier.

+ References

No definition available.

+ Details

Name:	rdcm_RoyaltiesPayableBasedOnStatedRepaymentFactor
Namespace Prefix:	rdcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Royalties payable in excess of original grant, based on an index.

+ References

No definition available.

+ Details

Name:	rdcm_RoyaltyPayableLinkage
Namespace Prefix:	rdcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

+ Details

Name:	us-gaap_AccruedRoyaltiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Royalty expense incurred and are directly related to 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(a),(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_DirectOperatingCostRoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid for royalties during the current period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRoyalties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ 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(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_RevenueFromGrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=rdcm_IsraeliMinistryOfTradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=rdcm_IsraelUnitedStatesBiNationalIndustrialResearchAndDevelopmentFoundationMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=rdcm_OfficeOfChiefScientistMember
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COMMITMENTS AND CONTINGENCIES (Royalty Commitments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long-term Purchase Commitment [Line Items]
Proceeds from grants received	$ 55us-gaap_RevenueFromGrants	$ 150us-gaap_RevenueFromGrants	$ 109us-gaap_RevenueFromGrants
OCS [Member]
Long-term Purchase Commitment [Line Items]
Royalty rates	3.50%
Percent of grants received paid in royalties	100.00%
Proceeds from grants received	36,685
Accumulated interest, grants	12,709
Accumulated royalties paid	10,918
Total commitment with respect to royalty-bearing participation received, net of royalties paid	38,476
Royalty expenses	827	706	562
BIRD-F [Member]
Long-term Purchase Commitment [Line Items]
Royalty rates	5.00%
Percent of grants received paid in royalties	150.00%
Proceeds from grants received	340
Royalties due based on stated percentage	789
Linkage to the United States Consumer Price Index	434
Accumulated royalties paid	355
Israeli Ministry of Trade [Member]
Long-term Purchase Commitment [Line Items]
Royalty rates	3.00%
Proceeds from grants received	$ 314
Maximum term for required royalty payments	5 years