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

Annual report pursuant to Section 13 and 15(d)

Loans and Other Arrangements (Details)

Loans and Other Arrangements (Details)	12 Months Ended						1 Months Ended		12 Months Ended				12 Months Ended		1 Months Ended	12 Months Ended				12 Months Ended			0 Months Ended
Loans and Other Arrangements (Details)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Novartis Note [Member] USD ($)	Dec. 31, 2013 Novartis Note [Member] USD ($)	Dec. 31, 2012 Novartis Note [Member] USD ($)	Jan. 31, 2014 Novartis Note [Member] Subsequent Event [Member] USD ($)	Jan. 31, 2014 Servier Loan [Member] USD ($)	Dec. 31, 2014 Servier Loan [Member] USD ($)	Dec. 31, 2013 Servier Loan [Member] USD ($)	Dec. 31, 2012 Servier Loan [Member] USD ($)	Dec. 31, 2012 Servier Loan [Member] EUR (€)	Dec. 31, 2014 Servier Loan [Member] Minimum [Member]	Dec. 31, 2014 Servier Loan [Member] Maximum [Member]	Sep. 30, 2012 General Electric Capital Corporation Term Loan [Member] USD ($) Installment	Dec. 31, 2014 General Electric Capital Corporation Term Loan [Member] USD ($) Installment	Dec. 31, 2013 General Electric Capital Corporation Term Loan [Member] USD ($)	Dec. 31, 2012 General Electric Capital Corporation Term Loan [Member] USD ($)	Sep. 27, 2012 General Electric Capital Corporation Term Loan [Member] USD ($)	Dec. 31, 2014 Other Financings [Member] USD ($)	Dec. 31, 2013 Other Financings [Member] USD ($)	Dec. 31, 2012 Other Financings [Member] USD ($)	Feb. 27, 2015 Hercules Loan [Member] Subsequent Event [Member] USD ($)	Feb. 27, 2015 Hercules Loan [Member] Subsequent Event [Member] USD ($)
Debt Instrument [Line Items]
Maturity date				Jun. 30, 2015												Jun. 15, 2015							Sep. 01, 2018
Research and development expenses funded through loan facility, maximum (in hundredths)				75.00%
Maximum borrowing capacity under loan agreement				$ 50,000,000								€ 15,000,000
Variable rate basis				six-month LIBOR					Euro Inter-Bank Offered Rate ("EURIBOR")														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%.
Basis spread on variable rate (in hundredths)				2.00%
Interest rate at period end (in hundredths)				2.35%
Outstanding principal balance				13,400,000	14,800,000				18,200,000							5,200,000	9,400,000	10,000,000	3,100,000
Periodic Payment, Principal															347,222
Accrued interest	1,444,000	(2,284,000)	(1,186,000)	300,000	400,000	400,000		200,000
Proceeds from loan											19,500,000				4,600,000
Percentage of milestone received (in hundredths)							25.00%
Milestone received under the collaboration agreement							7,000,000
Repayment of debt							1,750,000
Increase (Decrease) in term loan obligation															12,500,000
Initial interest rate during period (in hundredths)									3.22%
Interest rate reset semi-annually during period (in hundredths)									2.16%				2.31%	3.83%
Unrealized foreign exchange gain (loss)	2,280,000	(662,000)	(295,000)						2,400,000	(800,000)	(400,000)
Unrealized foreign exchange gains related to re-measurement of loan discount									(300,000)	200,000	100,000
Euro to US Dollar exchange rates	1.216								1.2160
Unamortized discount on debt									8,900,000
Amortization period for loan discount									5 years
Amortization of debt discount									1,900,000	1,600,000	1,400,000
Carrying value of the loan	35,537,000us-gaap_LongTermDebt								16,200,000	16,500,000														20,000,000
Recognition of deferred revenue									1,900,000	1,600,000	1,400,000
Debt issuance costs															200,000	1,300,000
Final payment fee																500,000			875,000
Fixed interest rate accrued (in hundredths)																11.71%			10.90%
Number of monthly installments															27	42
Prepayment premium year one (in hundredths)																3.00%
Prepayment premium year two (in hundredths)																2.00%
Prepayment premium year thereafter (in hundredths)																1.00%
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
Outstanding principle balance and interest																							5,500,000
Aggregate future principal and final fee payments of total interest bearing obligations - long-term [Abstract]
2015	20,276,000
2016	18,447,000
Long-term debt including current portion	38,723,000
Less: interest, final payment and discount	(3,186,000)
Total long-term	35,537,000us-gaap_LongTermDebt								16,200,000	16,500,000														20,000,000
Less current portion	(19,247,000)
Total long-term debt	16,290,000
Interest expense and amortization of debt issuance costs [Abstract]
Interest expense	$ 4,303,000us-gaap_InterestExpenseDebt	$ 4,631,000us-gaap_InterestExpenseDebt	$ 4,387,000us-gaap_InterestExpenseDebt	$ 312,000	$ 362,000	$ 397,000			$ 2,330,000	$ 2,152,000	$ 2,097,000					$ 1,638,000	$ 2,064,000	$ 1,850,000		$ 23,000	$ 53,000	$ 43,000