XML 49 R37.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Disposition (Details) - Biodefense Business [Member] | Nov. 04, 2015 USD ($) shares
--- | ---
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Sales of business, number of common stock shares eligible to receive | shares | 1,150
Royalties receivable percentage on net sales | 15.00%
Maximum [Member] |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Cash payments from Nanotherapeutics | $ | $ 4,500,000

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

X
- Definition The amount of contingent payments the company is entitled to receive related to sole performance of counterparty under the agreement. + References No definition available. + Details
Name: | xoma_ContingentPayment
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Royalty receivable percentage on net sales. + References No definition available. + Details
Name: | xoma_RoyaltyReceivablePercentageOnNetSales
Namespace Prefix: | xoma_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sales of business number of common stock shares eligible to receive. + References No definition available. + Details
Name: | xoma_SalesOfBusinessNumberOfCommonStockSharesEligibleToReceive
Namespace Prefix: | xoma_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=xoma_BiodefenseBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |