XML 27 R40.htm IDEA: XBRL DOCUMENT
v3.20.1

Licensing and Other Arrangements - Rezolute (Details) - Rezolute - USD ($) $ in Millions |  | 19 Months Ended
--- | --- | ---
Dec. 06, 2017 | Jun. 30, 2019
License Agreement and Common Stock Purchase Agreement |  |
Licensing and other arrangements |  |
License agreement consideration received | $ 0.0 |
License Agreement |  |
Licensing and other arrangements |  |
Percentage of decrease in future royalty obligations | 20.00% |
Agreement termination prior written notice period | 90 days |
License Agreement, RZ358 |  |
Licensing and other arrangements |  |
Maximum eligible milestone payments receivable upon achievement of development, regulatory and commercial milestones | $ 232.0 |
Royalty payment period | 12 years |
License Agreement, Non-RZ358 products |  |
Licensing and other arrangements |  |
Royalty payment period | 12 years |
License Agreement, X129 |  |
Licensing and other arrangements |  |
Upfront option fee |  | $ 1.0
Maximum eligible milestone payments receivable upon achievement of development, regulatory and commercial milestones |  | $ 237.0

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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Agreement termination prior written notice period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days + References No definition available. + Details
Name: | xoma_AgreementTerminationPriorWrittenNoticePeriod
Namespace Prefix: | xoma_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum eligible milestone payments receivable upon achievement of development, regulatory and commercial milestones. May also include potential payments for achievement of clinical milestones. + References No definition available. + Details
Name: | xoma_EligibleMilestonePaymentsReceivableUponAchievementOfDevelopmentRegulatoryAndCommercialMilestones
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition License agreement consideration received. + References No definition available. + Details
Name: | xoma_LicenseAgreementConsiderationReceived
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of decrease in future royalty obligations upon certain conditions under the terms of the agreement. + References No definition available. + Details
Name: | xoma_PercentageOfDecreaseInFutureRoyaltyObligations
Namespace Prefix: | xoma_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum period over which counterparty is obligated to pay royalties under terms of agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days + References No definition available. + Details
Name: | xoma_RoyaltiesPeriodMinimum
Namespace Prefix: | xoma_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Upfront payment to be received from counterparty, if counterparty elects option to obtain exclusive license for one of entity's products. + References No definition available. + Details
Name: | xoma_UpfrontOptionPayment
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=xoma_RezoluteIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xoma_LicenseAgreementAndCommonStockPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xoma_LicenseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xoma_LicenseAgreementRz358Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xoma_LicenseAgreementNonRz358ProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xoma_LicenseAgreementX129Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |