XML 80 R69.htm IDEA: XBRL DOCUMENT
v3.22.1

Capital Stock - Depositary Shares Representing Interest in Series B Preferred Stock (Details) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 8 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 09, 2021 USD ($) $ / shares shares | Mar. 31, 2022 M D $ / shares shares | Mar. 31, 2021 USD ($) | Mar. 31, 2022 $ / shares shares | Dec. 31, 2021 $ / shares shares | Apr. 15, 2026 $ / shares | Apr. 15, 2025 $ / shares | Apr. 15, 2024 $ / shares | Apr. 15, 2023 $ / shares | Apr. 15, 2022 $ / shares
Sale of stock |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 1,000,000 |  | 1,000,000 | 1,000,000 |  |  |  |  |
Stock issuance costs | $ |  |  | $ 264 |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 0.05 |  | $ 0.05 | $ 0.05 |  |  |  |  |
8.375% Series B Cumulative, Perpetual Preferred Stock |  |  |  |  |  |  |  |  |  |
Sale of stock |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 3,600 |  | 3,600 | 3,600 |  |  |  |  |
Preferred stock, shares issued (in shares) | shares |  | 1,600 |  | 1,600 | 1,600 |  |  |  |  |
Preferred stock, dividend rate (as a percent) |  | 8.375% |  |  | 8.375% |  |  |  |  |
Liquidation preference (in dollars per share) |  | $ 25,000.00 |  | $ 25,000.00 |  |  |  |  |  |
Preferred stock, dividend amount (in dollars per share) |  | $ 2,093.75 |  |  |  |  |  |  |  |
Number of days in year over which dividend will be prorated and computed | D |  | 360 |  |  |  |  |  |  |  |
Number of months in year over which dividend will be prorated and compute | M |  | 12 |  |  |  |  |  |  |  |
Number of days in month over which dividend will be prorated and computed | D |  | 30 |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 0.05 |  | 0.05 | $ 0.05 |  |  |  |  |
Redemption price at which company has option to redeem outstanding shares upon the occurrence of a delisting event or change of control event (in dollars per share) |  | 25,000.00 |  | 25,000.00 |  |  |  |  |  |
Redemption price (in dollars per share) |  | $ 25,000.00 |  | $ 25,000.00 |  |  |  |  |  |
Share cap (in shares) | shares |  | 1,253.13 |  | 1,253.13 |  |  |  |  |  |
8.375% Series B Cumulative, Perpetual Preferred Stock | Forecast |  |  |  |  |  |  |  |  |  |
Sale of stock |  |  |  |  |  |  |  |  |  |
Redemption price (in dollars per share) |  |  |  |  |  | $ 25,000.00 | $ 25,250.00 | $ 25,500.00 | $ 25,750.00 | $ 26,000.00
Series B Depositary Shares |  |  |  |  |  |  |  |  |  |
Sale of stock |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares | 1,600,000 |  |  |  |  |  |  |  |  |
Purchase price (in dollars per share) | $ 25.00 |  |  |  |  |  |  |  |  |
Proceeds from issuance of preferred stock | $ | $ 40,000 |  |  |  |  |  |  |  |  |
Stock issuance costs | $ | 2,900 |  |  |  |  |  |  |  |  |
Net proceeds from issuance of preferred stock | $ | $ 37,100 |  |  |  |  |  |  |  |  |
Share cap (in shares) | shares |  | 1.25313 |  | 1.25313 |  |  |  |  |  |
Series B Depositary Shares | Forecast |  |  |  |  |  |  |  |  |  |
Sale of stock |  |  |  |  |  |  |  |  |  |
Redemption price (in dollars per share) |  |  |  |  |  | $ 25.00 | $ 25.25 | $ 25.50 | $ 25.75 | $ 26.00
Series B Depositary Shares | 2021 ATM Agreement |  |  |  |  |  |  |  |  |  |
Sale of stock |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  | 0 |  |  |  |  |  |

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21484-112644 + Details
Name: | us-gaap_PreferredStockLiquidationPreference
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21488-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21564-112644 + Details
Name: | us-gaap_PreferredStockRedemptionPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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_SubsidiarySaleOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The dividend amount per share based on the dividend rate on preferred stock. + References No definition available. + Details
Name: | xoma_PreferredStockDividendAmountPerShare
Namespace Prefix: | xoma_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of days in month over which dividend will be prorated and computed for any period greater or less than a full dividend period. + References No definition available. + Details
Name: | xoma_PreferredStockDividendPeriodMonth
Namespace Prefix: | xoma_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of months in year over which dividend will be prorated and computed for any period greater or less than a full dividend period. + References No definition available. + Details
Name: | xoma_PreferredStockDividendPeriodProratedMonthsInYear
Namespace Prefix: | xoma_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of days in year over which dividend will be prorated and computed for any period greater or less than a full dividend period. + References No definition available. + Details
Name: | xoma_PreferredStockDividendPeriodYearProrated
Namespace Prefix: | xoma_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The price per share the company has option to redeem outstanding shares upon the occurrence of a delisting event or change of control event. + References No definition available. + Details
Name: | xoma_PreferredStockRedemptionPricePerShareOptionalRedemption
Namespace Prefix: | xoma_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share cap for which holder of shares can convert preferred shares into common stock pursuant to redemption rights. + References No definition available. + Details
Name: | xoma_PreferredStockShareCap
Namespace Prefix: | xoma_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References No definition available. + Details
Name: | xoma_ProceedsFromIssuanceOfPreferredStockNet
Namespace Prefix: | xoma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=dei_AdrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=xoma_AtMarketIssuanceSalesAgreement2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |