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Segment Reporting
 12 Months Ended
Dec. 31, 2023
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Company’s chief operating decision makers (the “CODM function”), which are the Company’s Chief Executive Officers, Mr. Duggan and Dr. Zanganeh, utilize consolidated financial information to make decisions about allocating resources and assessing performance for the entire Company. The CODM function approves of key operating and strategic decisions, including key decisions in clinical development and clinical operating activities, entering into significant contracts, such as revenue contracts and collaboration agreements and approves the Company’s consolidated operating budget. The CODM function views the Company’s operations and manages its business as a single reportable operating segment. The Company’s single operating segment covers the Company’s research and development activities, primarily comprising of oncology product research activities (including ivonescimab), antibiotic pipeline research activities, and CDI program activities. As the Company operates in one operating segment, all required financial segment information can be found in the consolidated financial statements.

The Company operates in two geographic regions: the U.K. and the U.S. The following table summarizes the Company’s long-lived assets, which include the Company’s property and equipment, net and right-of-use assets by geography:

Year Ended December 31, 2023Year Ended December 31, 2022
United Kingdom(1)
$808 $2,517 
United States(2)
5,254 2,564 
$6,062 $5,081 
(1) The decrease of long-lived assets in the United Kingdom is primarily attributed to the Company exiting its lease for its Sawston, United Kingdom location.
(2) The increase of long-lived assets in the United States is primarily attributed to additional right-of-use assets recorded related to the Company’s amendment to its sublease agreement during the period for its Menlo Park, California, U.S. location.

For details of revenue from external customers by geography refer to Note 8.