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Equity Incentive Awards (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | Stock Options. The following is a summary of stock option activity under Lexicon’s equity incentive plans for the year ended December 31, 2024:
|  | As of December 31, 2024
(in thousands, except exercise price data) |  | Options |  | Weighted Average Exercise Price
Outstanding at beginning of year |  | 18,705 |  |  | $ | 3.93 |
Granted |  | 7,377 |  |  | 1.92 |
Exercised |  | (51) |  |  | 1.72 |
Expired |  | (296) |  |  | 11.79 |
Forfeited |  | (10,346) |  |  | 3.36 |
Outstanding at end of year |  | 15,389 |  |  | 3.20 |
Exercisable at end of year |  | 7,518 |  |  | $ | 4.33 |
Summary of Weighted-Average Stock Options Assumptions | The following weighted-average assumptions were used for stock options granted in the years ended December 31, 2024, 2023 and 2022, respectively:
| Expected Volatility |  | Risk-free Interest Rate |  | Expected Term |  | Dividend Rate
December 31, 2024: |  |  |  |  |  |  |
Employees | 96% |  | 4.4% |  | 4 |  | 0 | %
Officers and non-employee directors | 104% |  | 4.2% |  | 6 |  | 0 | %
December 31, 2023: |  |  |  |  |  |  |
Employees | 110% |  | 3.9% |  | 4 |  | 0 | %
Officers and non-employee directors | 98% |  | 4.0% |  | 6 |  | 0 | %
December 31, 2022: |  |  |  |  |  |  |
Employees | 109% |  | 2.8% |  | 4 |  | 0 | %
Officers and non-employee directors | 91% |  | 1.9% |  | 7 |  | 0 | %
Summary of Restricted Stock Units Activity | The following is a summary of restricted stock units activity under Lexicon’s stock-based compensation plans for the year ended December 31, 2024:
|  | Shares |  | Weighted Average Grant Date Fair Value
|  | (in thousands) |  |
Outstanding at December 31, 2023 |  | 5,015 |  |  | $ | 2.78 |
Granted |  | 8,527 |  |  | 2.14 |
Vested |  | (1,970) |  |  | 3.10 |
Forfeited |  | (5,272) |  |  | 2.23 |
Outstanding at December 31, 2024 |  | 6,300 |  |  | $ | 2.27 |

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- 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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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