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

Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt and Other Financings (Details)

Long-Term Debt and Other Financings (Details)	3 Months Ended		12 Months Ended	0 Months Ended	3 Months Ended				3 Months Ended			1 Months Ended	3 Months Ended		12 Months Ended				3 Months Ended		0 Months Ended		0 Months Ended		0 Months Ended		3 Months Ended			3 Months Ended
Long-Term Debt and Other Financings (Details)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)	Sep. 27, 2012 General Electric Capital Corporation Term Loan [Member]	Mar. 31, 2015 General Electric Capital Corporation Term Loan [Member] USD ($)	Mar. 31, 2014 General Electric Capital Corporation Term Loan [Member] USD ($)	Sep. 27, 2012 General Electric Capital Corporation Term Loan [Member] USD ($)	Dec. 31, 2011 General Electric Capital Corporation Term Loan [Member] USD ($)	Mar. 31, 2015 Hercules Loan [Member] USD ($)	Mar. 31, 2014 Hercules Loan [Member] USD ($)	Feb. 27, 2015 Hercules Loan [Member] USD ($)	Jan. 31, 2015 Servier Loan [Member] USD ($)	Mar. 31, 2015 Servier Loan [Member] USD ($)	Mar. 31, 2014 Servier Loan [Member] USD ($)	Dec. 31, 2011 Servier Loan [Member] USD ($)	Jan. 09, 2015 Servier Loan [Member] Tranche	Dec. 31, 2014 Servier Loan [Member] USD ($)	Dec. 31, 2011 Servier Loan [Member] EUR (€)	Mar. 31, 2015 Servier Loan [Member] Minimum [Member]	Mar. 31, 2015 Servier Loan [Member] Maximum [Member]	Jan. 09, 2015 Servier Loan [Member] Tranche One [Member]	Jan. 09, 2015 Servier Loan [Member] Tranche One [Member] EUR (€)	Jan. 09, 2015 Servier Loan [Member] Tranche Two [Member]	Jan. 09, 2015 Servier Loan [Member] Tranche Two [Member] EUR (€)	Jan. 09, 2015 Servier Loan [Member] Tranche Three [Member]	Jan. 09, 2015 Servier Loan [Member] Tranche Three [Member] EUR (€)	Mar. 31, 2015 Novartis Note [Member] USD ($)	Mar. 31, 2014 Novartis Note [Member] USD ($)	Dec. 31, 2014 Novartis Note [Member] USD ($)	Mar. 31, 2015 Other [Member] USD ($)	Mar. 31, 2014 Other [Member] USD ($)
Debt Instrument [Line Items]
Maturity date									Sep. 01, 2018												Jan. 15, 2016		Jan. 15, 2017		Jan. 15, 2018		Jun. 30, 2015
Date of agreement													Dec. 30, 2010
Date of agreement, after amendment													Aug. 12, 2013
Research and development expenses funded through loan facility, maximum (in hundredths)																											75.00%
Maximum borrowing capacity under loan agreement																		€ 15,000,000									$ 50,000,000
Variable rate basis									The interest rate will be calculated at a rate equal to the greater of either (i) 9.40% plus the prime rate as reported from time to time in The Wall Street Journal minus 7.25%, and (ii) 9.40%.				Euro Inter-Bank Offered Rate ("EURIBOR")														six-month LIBOR
Basis spread on variable rate (in hundredths)																											2.00%
Period of interest resetting													6 months
Interest rate at period end (in hundredths)																											2.35%
Outstanding principal balance								10,000,000	20,000,000				16,300,000				18,200,000										13,400,000		13,400,000
Proceeds from loan															19,500,000
Initial interest rate during period (in hundredths)													3.22%
Interest rate reset semi-annually during period (in hundredths)													2.16%						2.31%	3.83%
Number of tranches																3
Principal payment amount																						3,000,000		5,000,000		7,000,000
Accrued interest	(90,000)	1,764,000										200,000
Euro to US Dollar exchange rates													1.085				1.216
Unamortized discount on debt									0				8,900,000
Fair value of loan amount									8,900,000				0
Unrealized foreign exchange gain (loss)	1,949,000	66,000											1,900,000
Loan discount balance													1,600,000
Amortization of debt discount									0				200,000	500,000
Carrying value of the loan	47,189,000us-gaap_LongTermDebt								20,000,000		20,000,000		14,700,000				16,200,000
Unrealized foreign exchange gain (loss) related to re-measurement of loan discount													200,000	0
Recognition of deferred revenue													200,000	500,000
Debt issuance costs			200,000us-gaap_DebtIssuanceCosts						500,000				6,000
Aggregate number of unregistered shares of common stock called by warrants (in shares)					263,158		39,346		181,268
Warrants exercise price (in dollars per share)					$ 1.14		$ 3.54		$ 3.31
Immediate Term for warrants exercisable (in years)				5 years	5 years
Fair value of warrant liability					200,000		100,000				500,000
Loss on extinguishment of debt	(429,000)	0			400,000
Outstanding principle balance and interest									5,500,000
Percentage bearing variable rate (in hundredths)									9.40%
Reduction of percentage of interest under loan agreement (in hundredths)									7.25%
Period of interest									1 year
Amortization date									Jul. 01, 2016
Date of extension of amortization									Oct. 01, 2016
Period of interest amortized									30 days
Prepayment fee within twelve months of maturity (in hundredths)									3.00%
Prepayment fee after twelve months but before twenty four months of maturity (in hundredths)									2.00%
Prepayment fee after twenty four months of maturity (in hundredths)									1.00%
Additional interest rate in case of default (in hundredths)									5.00%
Final payment fee									1,215,000
Exercisable period of warrants									5 years
Aggregate future principal and final fee payments of total interest bearing obligations - long-term [Abstract]
Nine months ending December 31, 2015	15,140,000
Year ended 2016	9,037,000
Year ended 2017	14,659,000
Year ended 2018	17,843,000
Long-term debt including current portion	56,679,000
Less: interest, final payment and discount	(9,490,000)
Total long-term	47,189,000us-gaap_LongTermDebt								20,000,000		20,000,000		14,700,000				16,200,000
Less current portion	(15,605,000)
Total long-term debt	31,584,000
Interest expense and amortization of debt issuance costs [Abstract]
Interest expense	$ 1,115,000us-gaap_InterestExpenseDebt	$ 1,125,000us-gaap_InterestExpenseDebt			$ 548,000	$ 448,000			$ 234,000	$ 0			$ 255,000	$ 587,000													$ 78,000	$ 77,000		$ 0	$ 13,000