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Stock-Based Compensation Expense (Tables) | 9 Months Ended
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Sep. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Summary of Restricted Stock Unit Activity | A summary of the restricted stock unit activity under the Plans for the nine months ended September 30, 2025 was as follows:
|  | Shares |  |  | Weighted- Average Grant Date Fair Value |
Unvested restricted stock units outstanding as of December 31, 2024 |  |  | 42,865 |  |  | $ | 132.09 |
Granted |  |  | 62,020 |  |  | $ | 9.86 |
Vested |  |  | (34,182 | ) |  | $ | 67.10 |
Forfeited |  |  | (11,821 | ) |  | $ | 210.07 |
Unvested restricted stock units outstanding as of September 30, 2025 |  |  | 58,882 |  |  | $ | 25.41 |
Summary of Stock Option Activity Under Plans | A summary of the stock option activity under the Plans for the nine months ended September 30, 2025 was as follows:
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2024 |  |  | 126,255 |  |  | $ | 283.02 |  |  |  | 7.5 |  |  | $ | — |
Cancelled |  |  | (57,697 | ) |  | $ | 375.57 |  |  |  |  |  |  |
Outstanding at September 30, 2025 |  |  | 68,558 |  |  | $ | 205.13 |  |  |  | 5.9 |  |  | $ | — |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense included in the Company’s condensed consolidated statements of operations and comprehensive loss was as follows (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Research and development |  | $ | 247 |  |  | $ | 214 |  |  | $ | 760 |  |  | $ | 627 |
General and administrative |  |  | (213 | ) |  |  | 1,277 |  |  |  | 1,013 |  |  |  | 4,150 |
Total |  | $ | 34 |  |  | $ | 1,491 |  |  | $ | 1,773 |  |  | $ | 4,777 |

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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 -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 Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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