XML 94 R74.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Capital Stock - Common Stock Warrants - Additional Information (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 29, 2016 | Feb. 28, 2015 | Sep. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2016 | Dec. 31, 2014 | Dec. 31, 2017
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Aggregate number of unregistered shares of common stock called by warrants (in shares) | 8,249 |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 15.40 |  |  |  |  |  |
Exercisable period of warrants | 5 years |  |  |  |  |  |
Warrants expiration period | 2021-02 |  |  |  |  |  |
Estimated fair value of warrants | $ 100,000 |  |  |  |  |  |
Warrants outstanding (in shares) |  |  |  |  | 498,556 |  | 17,312
Five Year Warrants Issued in February 2015 [Member] | Hercules Loan [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Aggregate number of unregistered shares of common stock called by warrants (in shares) |  | 9,063 |  |  |  |  |
Exercise price of warrants (in dollars per share) |  | $ 66.20 |  |  |  |  |
Exercisable period of warrants |  | 5 years |  |  |  |  |
Two Year Warrants Issued in December 2014 [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) |  |  |  |  |  | $ 158.01 |
Warrant term |  |  |  |  |  | 2 years |
Warrants outstanding (in shares) |  |  |  |  |  | 404,833 |
Warrants expiration period |  |  |  |  |  | 2016-12 |
December 2014 Revalued Warrants [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Gain (loss) on revaluation of warrant liability |  |  |  |  | $ 3,000,000 |  |
Five Year Warrants Issued in September 2012 [Member] | GECC Term Loan [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Aggregate number of unregistered shares of common stock called by warrants (in shares) |  |  | 1,967 |  |  |  |
Exercise price of warrants (in dollars per share) |  |  | $ 70.80 |  |  |  |
Exercisable period of warrants |  |  | 5 years |  |  |  |
Warrants expiration period |  |  | 2017-09 |  |  |  |
Five Year Warrants Issued in March 2012 [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Aggregate number of unregistered shares of common stock called by warrants (in shares) |  |  |  | 741,729 |  |  |
Exercise price of warrants (in dollars per share) |  |  |  | $ 35.20 |  |  |
Estimated fair value of warrants |  |  |  |  | 0 |  |
Warrant term |  |  |  | 5 years |  |  |
Warrants expiration period |  |  |  | 2017-03 |  |  |
March 2012 Revalued Warrants [Member] |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |
Gain (loss) on revaluation of warrant liability |  |  |  |  | $ 7,500,000 |  |

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 + Details
Name: | us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value portion of warrants not settleable in cash classified as equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsNotSettleableInCashFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The month and year (YYYY-MM) in which the warrants or rights expire. + References No definition available. + Details
Name: | xoma_ClassOfWarrantOrRightExpirationYearAndMonth
Namespace Prefix: | xoma_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock warrants expiration date. + References No definition available. + Details
Name: | xoma_CommonStockWarrantsExpirationDate
Namespace Prefix: | xoma_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the exercisable period for warrants beginning on the date of issuance and ending on the earlier to occurrence. + References No definition available. + Details
Name: | xoma_ExercisablePeriodOfWarrants
Namespace Prefix: | xoma_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of warrants period after which warrants are exercisable. + References No definition available. + Details
Name: | xoma_WarrantTerm
Namespace Prefix: | xoma_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_FiveYearWarrantsIssuedThirdRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=xoma_HerculesLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_TwoYearWarrantsIssuedForthRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_DecemberTwoThousandFourteenRevaluedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_FiveYearWarrantsIssuedSecondRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=xoma_GeneralElectricCapitalCorporationTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_FiveYearWarrantsIssuedFirstRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=xoma_MarchTwoThousandTwelveRevaluedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |