XML 18 R28.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Commitments and Contingencies (Details) - Jun. 30, 2015 - USD ($) $ in Millions | Total
--- | ---
Commitments and Contingencies [Abstract] |
Royalties paid, minimum (in hundredths) | 0.50%
Royalties paid, maximum (in hundredths) | 5.00%
Sublicense fees paid, maximum (in hundredths) | 40.00%
Estimate of milestone payments | $ 76.5

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

X
- Definition Reflects estimated obligations that are due and payable upon achievement of certain criteria categorized as developmental, regulatory, or commercial milestones. + References No definition available. + Details
Name: | xoma_ContractualObligationEstimatedMilestonePayments
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum percentage of royalties paid to selling price of licensed components. + References No definition available. + Details
Name: | xoma_RoyaltiesPaidPercentageMaximum
Namespace Prefix: | xoma_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum percentage of royalties paid to selling price of licensed components. + References No definition available. + Details
Name: | xoma_RoyaltiesPaidPercentageMinimum
Namespace Prefix: | xoma_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum percentage of royalties paid to sublicense fees. + References No definition available. + Details
Name: | xoma_RoyaltiesPaidSublicenseFeePercentageMaximum
Namespace Prefix: | xoma_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration