XML 35 R25.htm IDEA: XBRL DOCUMENT
v3.23.1

Stock Based Compensation (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Share-based compensation |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted |  | Weighted | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ | ​ | Number of | ​ | Price | ​ | Remaining Term | ​ | Value
​ | ​ | shares | ​ | Per Share | ​ | (in years) | ​ | (in thousands)
Outstanding at January 1, 2023 | ​ | ​ | 2,025,542 | ​ | $ | 20.24 |  | ​ | 6.10 | ​ | $ | 10,804
Granted |  | ​ | 725,000 | ​ |  | 23.74 |  | ​ |  |  | ​ |
Exercised |  | ​ | — | ​ |  | — |  | ​ |  |  | ​ |
Forfeited, expired or cancelled | ​ | ​ | (43,998) | ​ |  | 38.68 |  | ​ |  |  | ​ |
Outstanding at March 31, 2023 | ​ | ​ | 2,706,544 | ​ | $ | 20.88 |  | ​ | 6.84 | ​ | $ | 15,134
Exercisable at March 31, 2023 | ​ | ​ | 1,773,379 | ​ | $ | 19.37 |  | ​ | 5.42 | ​ | $ | 13,914
​
Summary of stock-based compensation expense | All stock-based compensation expense is recorded in G&A expense. The following table shows total stock-based compensation expense for stock options issued under the 2010 Plan, the Stock Option Inducement Awards and ESPP in the condensed consolidated statements of operations and comprehensive loss (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2023 |  | 2022
Total stock-based compensation expense included in G&A | ​ | $ | 1,570 | ​ | $ | 978
​
2010 Plan |
Share-based compensation |
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2023 |  | 2022 |
Dividend yield |  | n/a | ​ | 0 | %
Expected volatility |  | n/a | ​ | 70 | %
Risk-free interest rate |  | n/a | ​ | 1.89 | %
Expected term |  | n/a | ​ | 5.66 years | ​
​
Stock Option Inducement Award, Exercise price of $18.66 per share |
Share-based compensation |
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2023 |  | 2022(1) |
Dividend yield |  | 0 | % | n/a | ​
Expected volatility |  | 69 | % | n/a | ​
Risk-free interest rate |  | 3.92 | % | n/a | ​
Expected term |  | 5.79 years | ​ | n/a | ​
​
| (1) | No Stock Option Inducement Awards were granted during the three months ended March 31, 2022.
​
Stock Option Inducement Award, Exercise price of $30.00 per share |
Share-based compensation |
Schedule of valuation assumptions | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2023 |  | 2022(1) |
Dividend yield |  | 0 | % | n/a | ​
Expected volatility |  | 91 | % | n/a | ​
Risk-free interest rate |  | 3.86 | % | n/a | ​
Expected term |  | 8.01 years | ​ | n/a | ​
​ (1) No Stock Option Inducement Awards were granted during the three months ended March 31, 2022. ​

X
- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=xoma_TwoThousandTenLongTermIncentiveAndStockAwardPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=xoma_StockOptionInducementAwardOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=xoma_StockOptionInducementAwardTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |