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SIGNIFICANT ACCOUNTING POLICIES (Annual Rates of Depreciation) (Details)	12 Months Ended
	Dec. 31, 2016
Computers and electronic 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	6.00%
Annual rate of depreciation, maximum	33.00%

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: