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Segment Reporting (Tables) | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Schedule of segment loss, including significant segment expenses | The table below is a summary of the segment loss, including significant segment expenses (in thousands):
| Three Months Ended September 30, 2025 |  | Nine Months Ended September 30, 2025 |  | Period from September 19, 2024 (Inception) Through September 30, 2024
CR-001 external research and development costs | $ | 8,714 |  |  | $ | 19,411 |  |  | $ | 2,469 |
CR-002 external research and development costs | 6,705 |  |  | 11,685 |  |  | — |
Other external research and discovery costs(1) | 357 |  |  | 2,179 |  |  | — |
General and administrative personnel costs | 3,225 |  |  | 10,517 |  |  | 112 |
Research and development personnel costs | 4,211 |  |  | 9,356 |  |  | — |
Professional and consulting fees | 1,542 |  |  | 5,852 |  |  | 50 |
Other segment items (2) | (147) |  |  | 2,545 |  |  | — |
Net loss and comprehensive loss | $ | 24,607 |  |  | $ | 61,545 |  |  | $ | 2,631 |
_________________________ (1)External research and discovery costs include CR-003 costs and other costs associated with candidate discovery activities. (2)Other segment items includes office and facilities expense, interest expense, and miscellaneous other expense offset by interest income.

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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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