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Segments and Major Customers (Details 1) (Customer Concentration Risk, Accounts Receivable [Member], Customer 1) | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Customer Concentration Risk | Accounts Receivable [Member] | Customer 1 |  |
Concentration Risk [Line Items] |  |
Customer concentration risk | 88.00% | 74.00%

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- Definition Customer concentration risk + References No definition available. + Details
Name: | rmbs_Customerconcentrationrisk
Namespace Prefix: | rmbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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