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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Related Party Transaction [Line Items] |  |  |
Research and development |  | $ 41,364 | $ 36,966
Proceeds from the issuance of SAFEs | $ 34,100 | 0 | 34,125
License Agreement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Amount Due to Related Party | 0 | 0 | 0
Research and development |  | 400 | 200
Adimab Agreement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Professional fees |  | 200 | 200
Member of the Scientific Advisory Board [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Amount Due to Related Party | $ 0 | 0 | 0
Member of the Scientific Advisory Board [Member] | Advisory Services Agreement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Professional fees |  | $ 100 | $ 100

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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 730 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482916/730-10-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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