XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.21.2

Royalty Purchase Agreements - Palobiofarma (Details) $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 26, 2019 USD ($) item | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Agreements |  |  |
Payments to acquire milestones and royalties |  | $ 20,500 |
Long-term royalty receivables |  | 55,075 | $ 34,575
Impairment of long-term royalty receivable |  | 0 | $ 0
Palobiofarma, S.L {Member] | Royalty Purchase Agreement [Member] |  |  |
Agreements |  |  |
Number of drug candidates | item | 6 |  |
Payments to acquire milestones and royalties | $ 10,000 |  |
Long-term royalty receivables | 10,000 |  |
Impairment of long-term royalty receivable |  | $ 0 |
Palobiofarma, S.L {Member] | Royalty Purchase Agreement [Member] | Silicon Valley Bank [Member] |  |  |
Agreements |  |  |
Proceeds from issuance of long-term debt | $ 5,000 |  |

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 The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of drug candidates under the terms of the agreement. + References No definition available. + Details
Name: | xoma_AgreementDrugCandidatesNumber
Namespace Prefix: | xoma_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long term royalty receivable assets. + References No definition available. + Details
Name: | xoma_ImpairmentOfLongTermRoyaltyReceivable
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long-term royalty receivable non current. + References No definition available. + Details
Name: | xoma_LongTermRoyaltyReceivableNonCurrent
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Payments related to purchase of royalty rights. + References No definition available. + Details
Name: | xoma_PaymentsRelatedToPurchaseOfRoyaltyRights
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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