XML 110 R75.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Commitments and Contingencies (Details 2) - USD ($) $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 17, 2017 | Aug. 16, 2013 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2] |  |  | $ 19,630 |  |  |
Contractual Obligation, Due in Second Year | [1],[2] |  |  | 18,082 |  |  |
Contractual Obligation, Due in Third Year | [1],[2] |  |  | 11,400 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2] |  |  | 173,692 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2] |  |  | 0 |  |  |
Contractual obligation | [1],[2] |  |  | $ 222,804 |  |  |
Terms of noncancellable license agreement, minimum (in years) |  |  |  | 1 year |  |  |
Rent expense |  |  |  |  | $ 5,200 | $ 4,400 |
Property, plant and equipment cost, capitalization amount |  |  |  |  | 40,300 |  | $ 32,000
unrecognized tax benefit excluding foreign tax withholdings |  |  |  | $ 24,600 |  |  |
Other commitments |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2] |  |  | 234 |  |  |
Contractual Obligation, Due in Second Year | [1],[2] |  |  | 234 |  |  |
Contractual Obligation, Due in Third Year | [1],[2] |  |  | 0 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2] |  |  | 0 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2] |  |  | 0 |  |  |
Contractual obligation | [1],[2] |  |  | 468 |  |  |
Software licenses |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2],[3] |  |  | 13,525 |  |  |
Contractual Obligation, Due in Second Year | [1],[2],[3] |  |  | 11,977 |  |  |
Contractual Obligation, Due in Third Year | [1],[2],[3] |  |  | 6,028 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2],[3] |  |  | 0 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2],[3] |  |  | 0 |  |  |
Contractual obligation | [1],[2],[3] |  |  | 31,530 |  |  |
Retention bonus liability |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2],[4] |  |  | 3,499 |  |  |
Contractual Obligation, Due in Second Year | [1],[2],[4] |  |  | 3,499 |  |  |
Contractual Obligation, Due in Third Year | [1],[2],[4] |  |  | 3,000 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2],[4] |  |  | 0 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2],[4] |  |  | 0 |  |  |
Contractual obligation | [1],[2],[4] |  |  | 9,998 |  |  |
Convertible notes |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2] |  |  | 0 |  |  |
Contractual Obligation, Due in Second Year | [1],[2] |  |  | 0 |  |  |
Contractual Obligation, Due in Third Year | [1],[2] |  |  | 0 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2] |  |  | 172,500 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2] |  |  | 0 |  |  |
Contractual obligation | [1],[2] |  |  | 172,500 |  |  |
Interest payments related to convertible notes |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [1],[2] |  |  | 2,372 |  |  |
Contractual Obligation, Due in Second Year | [1],[2] |  |  | 2,372 |  |  |
Contractual Obligation, Due in Third Year | [1],[2] |  |  | 2,372 |  |  |
Contractual Obligation, Due in Fourth Year | [1],[2] |  |  | 1,192 |  |  |
Contractual Obligation, Due in Fifth Year | [1],[2] |  |  | 0 |  |  |
Contractual obligation | [1],[2] |  |  | 8,308 |  |  |
Imputed financing obligation |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [5] |  |  |  | 5,677 |  |
Contractual Obligation, Due in Second Year | [5] |  |  |  | 2,404 |  |
Contractual Obligation, Due in Third Year | [5] |  |  |  | 0 |  |
Contractual Obligation, Due in Fourth Year | [5] |  |  |  | 0 |  |
Contractual Obligation, Due in Fifth Year | [5] |  |  |  | 0 |  |
Contractual obligation | [5] |  |  |  | 8,081 |  |
Leases and other contractual obligations |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [5] |  |  |  | 5,333 |  |
Contractual Obligation, Due in Second Year | [5] |  |  |  | 4,883 |  |
Contractual Obligation, Due in Third Year | [5] |  |  |  | 4,960 |  |
Contractual Obligation, Due in Fourth Year | [5] |  |  |  | 3,271 |  |
Contractual Obligation, Due in Fifth Year | [5] |  |  |  | 968 |  |
Contractual obligation | [5] |  |  |  | 19,415 |  |
Convertible notes | 1.125% Convertible Senior Notes due 2018 |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Face value |  |  | $ 138,000 |  |  |  |
Debt Instrument, Convertible, Remaining Discount Amortization Period |  |  | 5 years |  |  |  |
Convertible notes | 1.375% convertible notes |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Face value |  | $ 172,500 |  | $ 172,500 | 172,500 |  |
Debt Instrument, Convertible, Remaining Discount Amortization Period |  | 5 years |  | 3 years 1 month 6 days |  |  |
Leasing Arrangement [Member] |  |  |  |  |  |  |
Contractual obligations |  |  |  |  |  |  |
Contractual Obligation, Due in Next Fiscal Year | [5] |  |  |  | 11,010 |  |
Contractual Obligation, Due in Second Year | [5] |  |  |  | 7,287 |  |
Contractual Obligation, Due in Third Year | [5] |  |  |  | 4,960 |  |
Contractual Obligation, Due in Fourth Year | [5] |  |  |  | 3,271 |  |
Contractual Obligation, Due in Fifth Year | [5] |  |  |  | 968 |  |
Contractual obligation | [5] |  |  |  | $ 27,496 |  |
[1] | For the Company’s lease commitments as of December 31, 2019, refer to Note 10, “Leases.”
[2] | The above table does not reflect possible payments in connection with unrecognized tax benefits of approximately $24.6 million including $22.8 million recorded as a reduction of long-term deferred tax assets and $1.8 million in long-term income taxes payable, as of December 31, 2019. As noted below in Note 19, “Income Taxes,” although it is possible that some of the unrecognized tax benefits could be settled within the next 12 months, the Company cannot reasonably estimate the outcome at this time.
[3] | The Company has commitments with various software vendors for agreements generally having terms longer than one year.
[4] | In connection with the acquisitions of Northwest Logic in August 2019 and the Secure Silicon IP and Protocols business in December 2019, the Company is obligated to pay retention bonuses to certain employees subject to certain eligibility and acceleration provisions including the condition of employment.
[5] | With respect to the imputed financing obligation, the main components of the difference between the amount reflected in the table above and the amount reflected on the consolidated balance sheet are the interest on the imputed financing obligation and the estimated common area expenses over the future periods. The amount includes the amended Ohio lease and the amended Sunnyvale lease.

X
- Definition Line item represents the contractual obligation included in table. + References No definition available. + Details
Name: | rmbs_ContractualObligationLineItems
Namespace Prefix: | rmbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the total capitalized amount of property, plant and equipment which was based on the estimated fair value of the portion of the unfinished leased building along with a corresponding financing obligation for the same amount. + References No definition available. + Details
Name: | rmbs_PropertyPlantAndEquipmentCostCapitalizationAmount
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Terms of Noncancellable License Agreement, Minimum + References No definition available. + Details
Name: | rmbs_TermsofNoncancellableLicenseAgreementMinimum
Namespace Prefix: | rmbs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrecognized tax benefits excluding foreign tax withholdings. + References No definition available. + Details
Name: | rmbs_Unrecognizedtaxbenefitexcludingforeigntaxwithholdings
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFourthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInThirdYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870 + Details
Name: | us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | rmbs_ContractualObligationAxis=us-gaap_OtherCommitmentsDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=us-gaap_SoftwareLicenseArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=rmbs_BusinessAcquisitionRetentionBonusPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=us-gaap_ConvertibleNotesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=rmbs_InterestPaymentRelatedToConvertibleNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=rmbs_ImputedFinancingObligationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_ContractualObligationAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleNotesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rmbs_SeniorOnePointOneTwoFivePercentConvertibleNotesDueTwoThousandEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=rmbs_SeniorOnePointThreeSevenFivePercentConvertibleNotesDueTwoThousandTwentyThreeMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rmbs_OperatingLeaseArrangementAxis=us-gaap_LeasingArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |