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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Schedule of Segment Reporting |
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
Tegoprubart - kidney transplantation programs |  | $ | 9,363 |  |  | $ | 10,167 |  |  | $ | 26,600 |  |  | $ | 19,284 |
Tegoprubart - other development programs |  |  | — |  |  |  | 14 |  |  |  | (168 | ) |  |  | 430 |
Manufacturing |  |  | 1,736 |  |  |  | 4,252 |  |  |  | 11,031 |  |  |  | 7,826 |
Personnel-related |  |  | 3,664 |  |  |  | 2,524 |  |  |  | 10,808 |  |  |  | 7,400 |
Stock-based compensation |  |  | 2,428 |  |  |  | 1,783 |  |  |  | 7,986 |  |  |  | 6,540 |
Other operating expenses |  |  | 1,879 |  |  |  | 1,770 |  |  |  | 5,510 |  |  |  | 4,401 |
Total operating expenses |  |  | 19,070 |  |  |  | 20,510 |  |  |  | 61,767 |  |  |  | 45,881 |
Loss from operations |  |  | (19,070 | ) |  |  | (20,510 | ) |  |  | (61,767 | ) |  |  | (45,881 | )
Other income, net |  |  | 1,047 |  |  |  | 1,042 |  |  |  | 3,680 |  |  |  | 2,485 |
Change in fair value of warrant liabilities |  |  | 564 |  |  |  | 96,439 |  |  |  | 22,917 |  |  |  | 51,829 |
Segment and net income (loss) |  | $ | (17,459 | ) |  | $ | 76,971 |  |  | $ | (35,170 | ) |  | $ | 8,433 |

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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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