XOMA Corporation Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Financial Statements Details - Outstanding Securities Considered Anti-Dilutive (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Antidilutive securities excluded from computation of net loss per share (in shares)	6,607	6,813	6,909	6,790
Performance Stock Unit Awards
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Shares issuable based on market price			0
Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Stock price (in dollars per share)	$ 26.48		$ 26.48
Convertible preferred stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Antidilutive securities excluded from computation of net loss per share (in shares)	5,003	5,003	5,003	5,003
Employee Stock Option
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Antidilutive securities excluded from computation of net loss per share (in shares)	1,473	1,804	1,775	1,781
Warrants for common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share
Antidilutive securities excluded from computation of net loss per share (in shares)	131	6	131	6