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Share-based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Schedule of share-based compensation expense | The following table provides share-based compensation reflected in the Company’s consolidated statements of operations and comprehensive loss for the years ended December 31, 2024 and 2023 (in thousands):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |
Research and development |  | $ | 91 |  |  | $ | 421 |
General and administrative |  |  | 534 |  |  |  | 646 |
|  | $ | 625 |  |  | $ | 1,067 |
Schedule of stock option activity | A summary of stock option activity for the year ended December 31, 2024 is as follows:
|  |  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  |  | Weighted |  |  | Average |  |  | Average |
|  |  |  |  | Average |  |  | Remaining |  |  | Intrinsic |
|  | Number |  |  | Exercise |  |  | Contractual |  |  | Value (in |
|  | of Options |  |  | Price |  |  | Term (Years) |  |  | thousands) |
Outstanding as of December 31, 2023 |  |  | 291,368 |  |  | $ | 189.09 |  |  |  | 4.6 |  |  | $ | — |
Granted |  |  | 55,849 |  |  | $ | 3.30 |  |  |  |  |  |  |
Exercised |  |  | — |  |  | $ | — |  |  |  |  |  |  |
Cancelled or forfeited |  |  | (11,769 | ) |  | $ | 165.74 |  |  |  |  |  |  |
Outstanding as of December 31, 2024 |  |  | 335,448 |  |  | $ | 158.98 |  |  |  | 4.7 |  |  | $ | — |
Exercisable at December 31, 2024 |  |  | 258,558 |  |  | $ | 199.26 |  |  |  | 3.5 |  |  | $ | — |
Schedule of weighted-average assumptions used in estimating the fair value of the stock options | The weighted-average Black-Scholes assumptions used in estimating the fair value of the stock options granted by Cyclerion during the years ended December 31, 2024 and 2023 were as follows:
|  | Year ended December 31, |
|  | 2024 |  |  | 2023 |
Weighted average risk-free interest rate |  |  | 3.64 | % |  |  | 3.47 | %
Expected dividend yield |  |  | — |  |  |  | — |
Expected option term (in years) |  |  | 6.0 |  |  |  | 6.0 |
Expected stock price volatility |  |  | 111.97 | % |  |  | 93.19 | %
Summary of stock awards containing market conditions activity | A summary of stock awards containing market conditions activity for the year ended December 31, 2024 is as follows:
|  |  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  |  | Weighted |  |  | Average |  |  | Aggregate |
|  |  |  |  | Average |  |  | Remaining |  |  | Intrinsic |
|  | Number of |  |  | Exercise |  |  | Contractual |  |  | Value (in |
|  | Options |  |  | Price |  |  | Term (years) |  |  | thousands) |
Outstanding as of December 31, 2023 |  |  | 7,500 |  |  | $ | 40.20 |  |  |  | 5.9 |  |  | $ | — |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Cancelled or forfeited |  |  | (7,500 | ) |  | $ | 40.20 |  |  |  | — |  |  | $ | — |
Outstanding as of December 31, 2024 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |
Exercisable at December 31, 2024 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |
Summary of RSA activity | A summary of RSA activity for the years ended December 31, 2024 is as follows:
|  |  |  |  | Weighted Average |
|  | Number |  |  | Grant Date |
|  | of Shares |  |  | Fair Value |
Unvested as of December 31, 2023 |  |  | 170,937 |  |  | $ | 2.28 |
Granted |  |  | 65,000 |  |  |  | 3.35 |
Vested |  |  | (71,763 | ) |  |  | 2.61 |
Forfeited |  |  | — |  |  |  | — |
Unvested as of December 31, 2024 |  |  | 164,174 |  |  | $ | 2.55 |

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