XOMA Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Capital Stock (Details)

Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended								11 Months Ended	12 Months Ended			23 Months Ended
	Feb. 27, 2015	Dec. 08, 2014	Sep. 27, 2012	Feb. 28, 2015	Dec. 31, 2013	Aug. 31, 2013	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Feb. 28, 2010	Jun. 30, 2009	Dec. 31, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 18, 2013	Aug. 23, 2013
Class Of Warrant Or Right [Line Items]
Offering price (in dollars per share)		$ 4.94
Warrant outstanding (in shares)													18,165,000	21,768,000
Capital units issued upon the underwriters 30-day over-allotment option (in shares)																	1,425,000
Proceeds from issuance of common stock													$ 481	$ 41,442	$ 84,338
Reclassification of contingent warrant liability to equity upon exercise of warrants													$ 3,552	$ 2,526	$ 6,171
Hercules Loan [Member]
Class Of Warrant Or Right [Line Items]
Exercise price of warrants (in dollars per share)	$ 3.31
Exercisable period of warrants	5 years
Aggregate number of unregistered shares of common stock called by warrants (in shares)	181,268
Fair value of warrant liability	$ 500
General Electric Capital Corporation Term Loan [Member]
Class Of Warrant Or Right [Line Items]
Exercise price of warrants (in dollars per share)			$ 3.54						$ 1.14
Exercisable period of warrants			5 years						5 years
Aggregate number of unregistered shares of common stock called by warrants (in shares)			39,346						263,158
Fair value of warrant liability			$ 100						$ 200
Five Year Warrants Issued in February 2015 [Member] \| Hercules Loan [Member]
Class Of Warrant Or Right [Line Items]
Exercise price of warrants (in dollars per share)				$ 3.31
Exercisable period of warrants				5 years
Aggregate number of unregistered shares of common stock called by warrants (in shares)				181,268
Two Year Warrants Issued in December 2014 [Member]
Class Of Warrant Or Right [Line Items]
Warrant outstanding (in shares)													8,097,165	8,097,165
Exercise price of warrants (in dollars per share)														$ 7.90
Warrant term														2 years
Fair value of warrant liability		$ 10,300											$ 3,000	$ 5,200
Gain (loss) on revaluation of warrant liability													$ 2,200
Five Year Warrants Issued in September 2012 [Member] \| General Electric Capital Corporation Term Loan [Member]
Class Of Warrant Or Right [Line Items]
Exercise price of warrants (in dollars per share)							$ 3.54
Exercisable period of warrants							5 years
Aggregate number of unregistered shares of common stock called by warrants (in shares)							39,346
Five Year Warrants Issued in March 2012 [Member]
Class Of Warrant Or Right [Line Items]
Warrant outstanding (in shares)								14,834,577					9,585,153	12,109,418
Exercise price of warrants (in dollars per share)								$ 1.76
Warrant term								5 years
Fair value of warrant liability													$ 7,500	$ 26,700
Gain (loss) on revaluation of warrant liability													$ 13,400
Warrants exercise (in shares)													2,524,265
Cashless exercise of warrants (in shares)													2,523,515
Exercise of warrants (in shares)													1,410,474
Gain (loss) on revaluation of warrant liability related to exercised warrants													$ 2,200
Reclassification of contingent warrant liability to equity upon exercise of warrants													$ 3,600
Five Year Warrants Issued in December 2011 [Member] \| General Electric Capital Corporation Term Loan [Member]
Class Of Warrant Or Right [Line Items]
Exercise price of warrants (in dollars per share)									$ 1.14
Exercisable period of warrants									5 years
Aggregate number of unregistered shares of common stock called by warrants (in shares)									263,158
Five Year Warrants Issued in February 2010 [Member]
Class Of Warrant Or Right [Line Items]
Warrant outstanding (in shares)										1,260,000
Exercise price of warrants (in dollars per share)										$ 10.50
Warrant term										5 years
Warrants Issued to Private Investors [Member]
Class Of Warrant Or Right [Line Items]
Warrant outstanding (in shares)											347,826
Exercise price of warrants (in dollars per share)											$ 19.50
Warrant term											5 years
Underwritten Offering [Member]
Class Of Warrant Or Right [Line Items]
Common stock per capital unit (in shares)		1
Gross proceeds from issuance of capital units		$ 40,000			$ 57,400	$ 31,600
Offering expense		$ 2,300			$ 3,800	$ 2,200
Immediate term for warrants exercisable (in years)		2 years
Warrant outstanding (in shares)		8,097,165
Exercise price of warrants (in dollars per share)		$ 7.90
Capital units issued (in shares)																	10,925,000	8,736,187
Capital units issued upon the underwriters 30-day over-allotment option (in shares)																		1,139,502
Period to purchase additional stock					30 days	30 days
Purchase price of capital units (in dollars per share)																	$ 5.25	$ 3.62
2011 ATM Agreement [Member]
Class Of Warrant Or Right [Line Items]
Sale of shares of common stock (in shares)												0				7,572,327
Proceeds from issuance of common stock												$ 500				$ 14,600
2015 ATM Agreement [Member]
Class Of Warrant Or Right [Line Items]
Sale of shares of common stock (in shares)													0
Sales commission paid per transaction (in hundredths)													3.00%