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Represents the number of business days immediately after any 10 consecutive trading day period during the debt instrument measurement period.

No definition available.

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Represents the number of consecutive trading days prior to the five business days during the debt instrument measurement period.

No definition available.

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Represents the denomination of the principal amount of debt used to calculate the percent of trading price during the debt instrument measurement period.

No definition available.

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Represents the percentage of the trading price of each debt instrument to the conversion value of the debt instrument that the trading price must be less than in order for the debt instruments to be convertible.

No definition available.

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The carrying amount of the liability component of convertible debt, which may be settled in cash upon conversion.

No definition available.

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The minimum percentage of the aggregate outstanding principal that is required for a nonpayment of debt default event to occur.

No definition available.

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The percentage of principal and accrued interest due upon default.

No definition available.

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The minimum percentage of the aggregate outstanding principal that is required for a declaration of immediate payment to occur.

No definition available.

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Data Type:	num:percentItemType
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Represent the period of default in payment of any interest.

No definition available.

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The number of days of debt nonpayment for a debt default event to occur.

No definition available.

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Represent the number of days of default to comply with the other agreements, after the receipt of written notice.

No definition available.

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Data Type:	xbrli:durationItemType
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Period Type:	duration

The minimum principal amount of debt nonpayment for a debt default event to occur.

No definition available.

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The minimum percentage of the aggregate outstanding principal that is required for a default event to occur with other agreements.

No definition available.

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The principal amount of debt used as the denominator to determine the number of shares that the debt can be converted into at the exchange rate.

No definition available.

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Debt Issuance Cost, Convertible, Equity Component

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Debt Issuance Cost, Convertible, Liability Component

No definition available.

Name:	rmbs_DebtIssuanceCostConvertibleLiabilityComponent
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Derivative, Nonmonetary Notional Amount, Shares

No definition available.

Name:	rmbs_DerivativeNonmonetaryNotionalAmountShares
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Balance Type:	na
Period Type:	instant

Potential Incremental Common Shares Attributable To Dilutive Effect Of Conversion Of Debt Securities

No definition available.

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Premium over stock price.

No definition available.

Name:	rmbs_StockPricePremium
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
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Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References

No definition available.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
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Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

No definition available.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

No definition available.

Name:	us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
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Data Type:	num:percentItemType
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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

No definition available.

Name:	us-gaap_DebtInstrumentConvertibleThresholdTradingDays
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Data Type:	xbrli:integerItemType
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Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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Name:	us-gaap_DebtInstrumentFaceAmount
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Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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Data Type:	num:percentItemType
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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.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Fair value amount of debt instrument that was repurchased.

No definition available.

Name:	us-gaap_DebtInstrumentRepurchaseAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
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Data Type:	xbrli:durationItemType
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Period Type:	duration

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Name:	us-gaap_DeferredFinanceCostsGross
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Data Type:	xbrli:monetaryItemType
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Price of a single share of a number of saleable stocks of a company.

No definition available.

Name:	us-gaap_SharePrice
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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleNotesPayableMember
Namespace Prefix:
Data Type:	na
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Period Type:

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Data Type:	na
Balance Type:
Period Type:

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