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Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Transations | The following table summarizes the stock option transactions for the 2023 Plans:
|  | Total Options |  |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2023 |  |  | 1,739,270 |  |  | $ |  | 15.71 |  |  |  | 6.99 |  |  | $ |  | 76 |
Granted |  |  | 1,326,500 |  |  |  |  | 4.12 |  |  |  | 9.47 |  |  |  |  | 4 |
Exercised |  |  | (12,852 | ) |  |  |  | 1.55 |  |  |  | — |  |  |  |  | — |
Cancelled |  |  | (228,475 | ) |  |  |  | 75.27 |  |  |  | — |  |  |  |  | — |
Outstanding at December 31, 2024 |  |  | 2,824,443 |  |  | $ |  | 5.51 |  |  |  | 8.15 |  |  | $ |  | 316 |
Vested and exercisable at December 31, 2024 |  |  | 1,350,852 |  |  | $ |  | 6.46 |  |  |  | 7.09 |  |  | $ |  | 210 |
Schedule of Assumptions Using Black-Scholes to Estimate Fair Value of the Stock Option Grants | The following is the range of underlying assumptions in Black-Scholes to determine the fair value of the stock option grants for the years ended December 31, 2024 and 2023:
|  | Year Ended December 31,
|  | 2024 |  | 2023
Risk free interest rate |  | 3.15% |  | 3.50%-3.56%
Expected volatility |  | 97% |  | 75%-76%
Expected term (years) |  | 6.01 |  | 6.25
Expected dividend yield |  | 0% |  | 0%
Summary of Restricted Stock Units (RSU) Activity | The following table summarizes restricted stock unit activity for the CalciMedica Plans:
|  | Number of Restricted Stock Units |  |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2023 |  |  | — |  |  | $ |  | — |
Granted |  |  | 40,000 |  |  |  |  | 3.50 |
Exercised |  |  | — |  |  |  |  | — |
Forfeited/Cancelled (expired) |  |  | — |  |  |  |  | — |
Outstanding at December 31, 2024 |  |  | 40,000 |  |  | $ |  | 3.50 |
Vested and exercisable at December 31, 2024 |  |  | — |  |  | $ |  | — |
Summary of Stock-Based Compensation Expense Recognized for Options and RSUs Granted | Stock-based compensation expense recognized for options and restricted stock units granted was as follows (in thousands):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |
Research and development |  | $ | 840 |  |  | $ | 2,449 |
General and administrative |  |  | 1,473 |  |  |  | 9,590 |
Total stock-based compensation expense |  | $ | 2,313 |  |  | $ | 12,039 |
Schedule of Common Stock Reserved for Future Issuance | Common stock reserved for future issuance consists of the following at December 31, 2024:
|  | December 31, |
|  | 2024 |
Common stock warrants |  |  | 3,352,621 |
Stock options issued and outstanding |  |  | 2,824,443 |
Shares available for issuance under the 2023 Plan |  |  | 807,414 |
Shares available under the 2023 ESPP |  |  | 122,545 |
Total |  |  | 7,107,023 |

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