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Share-based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2024
Share-Based Payment Arrangement [Abstract] |
Schedule of share-based compensation expense | The following table provides share-based compensation reflected in the Company’s condensed consolidated statements of operations and comprehensive loss for the three and six months ended June 30, 2024 and 2023 (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Research and development |  | $ | 24 |  |  | $ | 181 |  |  | $ | 50 |  |  | $ | 410 |
General and administrative |  |  | 160 |  |  |  | 198 |  |  |  | 315 |  |  |  | 395 |
|  | $ | 184 |  |  | $ | 379 |  |  | $ | 365 |  |  | $ | 805 |
Schedule of stock option activity | A summary of stock option activity (excluding market-based stock options) for the six months ended June 30, 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 |  |  | — |  |  |  | — |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |
Cancelled or forfeited |  |  | (7,518 | ) |  |  | 198.52 |  |  |  |  |  |  |
Outstanding as of June 30, 2024 |  |  | 283,850 |  |  | $ | 188.84 |  |  |  | 4.2 |  |  | $ | — |
Exercisable at June 30, 2024 |  |  | 250,429 |  |  | $ | 206.52 |  |  |  | 3.9 |  |  | $ | — |
Summary of RSA activity | A summary of RSA activity for the six months ended June 30, 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 |  |  | (41,715 | ) |  |  | 2.68 |
Forfeited |  |  | — |  |  |  | — |
Unvested as of June 30, 2024 |  |  | 194,222 |  |  | $ | 2.55 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -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 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -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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