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SIGNIFICANT ACCOUNTING POLICIES (Annual Rates of Depreciation) (Details) | 12 Months Ended
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Dec. 31, 2012
Demonstration and rental equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Annual rate of depreciation | 33.00% |
Research and development equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Annual rate of depreciation, minimum | 25.00% |
Annual rate of depreciation, maximum | 33.00% |
Manufacturing equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Annual rate of depreciation, minimum | 15.00% |
Annual rate of depreciation, maximum | 33.00% |
Office furniture and equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Annual rate of depreciation, minimum | 7.00% |
Annual rate of depreciation, maximum | 33.00% |
Leasehold improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Annual rate of depreciation |  | [1]
[1] | At the shorter of the lease period or useful life of the leasehold improvement.

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- Definition Depreciation Rate + References No definition available. + Details
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Namespace Prefix: | rdcm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate of depreciation, maximum. + References No definition available. + Details
Name: | rdcm_DepreciationRateMaximum
Namespace Prefix: | rdcm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate of depreciation, minimum. + References No definition available. + Details
Name: | rdcm_DepreciationRateMinimum
Namespace Prefix: | rdcm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration