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

Licensing and Other Arrangements - Sale of Future Revenue Streams (Details)

Licensing and Other Arrangements - Sale of Future Revenue Streams (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 21, 2016 USD ($) period agreement	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Licensing and other arrangements
Unearned revenue recognized under units-of-revenue method				$ (1,241)	$ (1,121)
Revenue recognized under units-of-revenue method		$ 426	$ 390	1,241	1,121
Unearned revenue recognized under units-of-revenue method, current		1,704		1,704		$ 1,641
Unearned revenue recognized under units-of-revenue method, noncurrent		10,381		10,381		11,685
HealthCare Royalty Partners II, L.P
Licensing and other arrangements
Revenue recognized under units-of-revenue method		400	$ 400	1,200	$ 1,100
HealthCare Royalty Partners II, L.P \| Royalty Sale Agreements
Licensing and other arrangements
Number of agreements \| agreement	2
Unearned revenue recognized under units-of-revenue method	$ 18,000
Unearned revenue recognized under units-of-revenue method, current		1,700		1,700		1,600
Unearned revenue recognized under units-of-revenue method, noncurrent		$ 10,400		$ 10,400		$ 11,700
HealthCare Royalty Partners II, L.P \| First Royalty Sale Agreement
Licensing and other arrangements
Cash payment received	6,500
Eligible potential additional payments receivable upon achievement of specified net sales milestones in future years	$ 4,000
Number of milestone periods \| period	3
HealthCare Royalty Partners II, L.P \| Second Royalty Sale Agreement
Licensing and other arrangements
Cash payment received	$ 11,500