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Summary of Significant Accounting Policies (Details 6)	12 Months Ended
	Dec. 31, 2022
Cash equivalents and marketable securities
Maximum maturity period of available-for-sale securities (in years)	3 years

X

- Definition

Represents the maximum maturity period of securities invested by the entity.

+ References

No definition available.

+ Details

Name:	rmbs_DebtSecuritiesAvailableForSaleSecuritiesMaximumMaturityPeriod
Namespace Prefix:	rmbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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