Marketable Securities - Additional Information (Details)	6 Months Ended
Jun. 30, 2025
Debt Securities, Available-for-Sale [Abstract]
Maximum maturity period of available-for-sale securities (in years)	3 years

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

No definition available.

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