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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Schedule of Research and Development, General and Administrative Expenses, and Restructuring Charges are Significant Segment Expenses | In addition, research and development, general and administrative expenses, and restructuring charges are significant segment expenses regularly provided to the PEO with the following categories (in thousands): Research and Development
| Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
| 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Clinical research and external costs | $ | 8 |  |  | $ | (852 | ) |  | $ | 23 |  |  | $ | 4,062 |
Facility and all other costs |  | — |  |  |  | 114 |  |  |  | — |  |  |  | 3,136 |
Compensation and benefits |  | — |  |  |  | 25 |  |  |  | (7 | ) |  |  | 1,966 |
Total research and development expense | $ | 8 |  |  | $ | (713 | ) |  | $ | 16 |  |  | $ | 9,164 |
General and Administrative
| Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
| 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Consulting and professional services | $ | 625 |  |  | $ | 788 |  |  | $ | 1,851 |  |  | $ | 2,838 |
Compensation and benefits |  | 139 |  |  |  | 342 |  |  |  | 433 |  |  |  | 1,603 |
Facility and all other costs |  | 54 |  |  |  | 35 |  |  |  | 170 |  |  |  | 787 |
Total general and administrative expense | $ | 818 |  |  | $ | 1,165 |  |  | $ | 2,454 |  |  | $ | 5,228 |
Restructuring Charges
| Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
| 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Facility and all other costs | $ | — |  |  | $ | 35 |  |  | $ | (80 | ) |  | $ | 15,537 |
Compensation and benefits |  | 58 |  |  |  | 221 |  |  |  | 167 |  |  |  | 8,245 |
Consulting and professional services |  | 107 |  |  |  | 20 |  |  |  | 126 |  |  |  | 686 |
Clinical research and external costs |  | — |  |  |  | 20 |  |  |  | (17 | ) |  |  | 322 |
Total restructuring charges | $ | 165 |  |  | $ | 296 |  |  | $ | 196 |  |  | $ | 24,790 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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