Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v2.4.0.8
Document and Entity Information
6 Months Ended
Jun. 30, 2013
Aug. 05, 2013
Document and Entity Information [Abstract]    
Entity Registrant Name XOMA Corp  
Entity Central Index Key 0000791908  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   83,158,482
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2013