XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Segments and Major Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Financial information of business segments |  |  |  |
Revenues | $ 56,458 | $ 94,720 | $ 102,884 | $ 192,071
Segment operating expenses | 40,699 | 44,669 | 82,064 | 86,058
Segment reconciling items | (35,746) | (41,807) | (84,420) | (84,335)
Operating income (loss) | (19,987) | 8,244 | (63,600) | 21,678
Interest and other income (expense), net | 3,615 | (3,132) | 8,310 | (6,184)
Income (Loss) before income taxes | (16,372) | 5,112 | (55,290) | 15,494
MID Segment |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 34,976 | 67,402 | 68,965 | 137,997
Segment operating expenses | 22,597 | 23,801 | 45,546 | 44,056
Segment Operating Income (Loss) | 12,379 | 43,601 | 23,419 | 93,941
RSD Segment |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 21,482 | 23,366 | 31,478 | 46,571
Segment operating expenses | 14,893 | 12,214 | 27,678 | 24,613
Segment Operating Income (Loss) | 6,589 | 11,152 | 3,800 | 21,958
Other |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 0 | 3,952 | 2,441 | 7,503
Segment operating expenses | 3,209 | 8,654 | 8,840 | 17,389
Segment Operating Income (Loss) | (3,209) | (4,702) | (6,399) | (9,886)
Operating Segments [Member] |  |  |  |
Financial information of business segments |  |  |  |
Segment Operating Income (Loss) | $ 15,759 | $ 50,051 | $ 20,820 | $ 106,013

X
- Definition Operating Expenses, Segment + References No definition available. + Details
Name: | rmbs_OperatingExpensesSegment
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total operating income loss for reporting segments. + References No definition available. + Details
Name: | rmbs_SegmentOperatingIncomeLoss
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Segment reconciling items + References No definition available. + Details
Name: | rmbs_Segmentreconcilingitems
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_NonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rmbs_MidSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rmbs_RSDMemberDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |