XML 51 R36.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Licensing and Other Arrangements - Sale of Future Revenue Streams - Additional Information (Details) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Dec. 21, 2016 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) Agreement | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Unearned revenue recognized under units-of-revenue method – current |  | $ 171,000 |  | $ 171,000 |  | $ 615,000 | [1]
Unearned revenue recognized under units-of-revenue method – non-current |  | 17,592,000 |  | $ 17,592,000 |  | 17,123,000 | [1]
HCRP [Member] |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Number of royalty Interest acquisition agreements | Agreement |  |  |  | 2 |  |  |
Unearned revenue recognized under units-of-revenue method |  | 18,000,000 |  | $ 18,000,000 |  |  |
Revenue recognized under units-of-revenue method |  | 43,000 | $ 100,000 | 197,000 | $ 200,000 |  |
Reversed revenue recognized under units-of-revenue method |  | 129,000 |  | 222,000 |  |  |
Decrease in net revenue due to change in estimate of product sales |  | (86,000) |  | (25,000) |  |  |
Unearned revenue recognized under units-of-revenue method – current |  | 200,000 |  | 200,000 |  | 600,000 |
Unearned revenue recognized under units-of-revenue method – non-current |  | $ 17,600,000 |  | 17,600,000 |  | $ 17,100,000 |
HCRP [Member] | First Acquisition Agreement [Member] |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Upfront cash payment received | $ 6,500,000 |  |  |  |  |  |
Eligible potential additional payments receivable upon achievement of specified net sales milestones in future years | 4,000,000 |  |  | $ 3,000,000 |  |  |
HCRP [Member] | Second Acquisition Agreement [Member] |  |  |  |  |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |
Upfront cash payment received | $ 11,500,000 |  |  |  |  |  |
[1] | The condensed consolidated balance sheet as of December 31, 2017 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

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 Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
Name: | us-gaap_DeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
Name: | us-gaap_DeferredRevenueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
Name: | us-gaap_DeferredRevenueNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Eligible potential additional payments receivable upon achievement of specified future net sales milestones. + References No definition available. + Details
Name: | xoma_EligiblePotentialAdditionalPaymentsReceivableUponAchievementOfSpecifiedFutureNetSalesMilestones
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (decrease) in net revenue due to change in estimate of product sales. + References No definition available. + Details
Name: | xoma_IncreaseDecreaseInNetRevenueDueToChangeInEstimateOfProductSales
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of royalty interest acquisition agreements. + References No definition available. + Details
Name: | xoma_NumberOfRoyaltyInterestAcquisitionAgreements
Namespace Prefix: | xoma_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from upfront payment. + References No definition available. + Details
Name: | xoma_ProceedsFromUpfrontPayment
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount recognized from the amortization of upfront payment resulting from the sale of royalties. + References No definition available. + Details
Name: | xoma_RevenueRecognizedUnderUnitsOfRevenueMethod
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reversed revenue recognized under units of revenue method. + References No definition available. + Details
Name: | xoma_ReversedRevenueRecognizedUnderUnitsOfRevenueMethod
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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