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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%

X

- Definition

Customer concentration risk

+ References

No definition available.

+ Details

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Namespace Prefix:	rmbs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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