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Segment Reporting | 3 Months Ended
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Mar. 31, 2025
Segment Reporting [Abstract] |
Segment Reporting | 9. Segment Reporting The Company has one reportable segment, which is related to the research and development of its product candidates focused on complement-mediated diseases of the body, brain and eye for which there is significant unmet medical need. The accounting policies of the one reportable segment are the same as those described in the summary of significant accounting policies. See Note 2—Basis of Presentation and Significant Accounting Policies. The segment is managed on a consolidated basis and the chief operating decision maker, or CODM uses total operating expenses and consolidated net loss to assess financial performance, forecast future financial results and allocate resources. In assessing the Company’s financial performance and making strategic decisions, the CODM regularly reviews operating expenses by function. This includes a review of budget versus actual expenses and direct program spend, which includes clinical costs, consultant fees, manufacturing expenses, and other direct external costs. The following table presents the operations for the reportable segment for the three months ended March 31, 2025 and 2024 (in thousands):
|  | Three Months Ended March 31, |
|  | 2025 |  |  | 2024 |
Research and development - external expenses(1) |  | $ | 34,498 |  |  | $ | 11,691 |
Research and development - personnel |  |  | 9,046 |  |  |  | 5,624 |
General and administrative - personnel |  |  | 2,340 |  |  |  | 1,496 |
Other general and administrative expenses(2) |  |  | 5,906 |  |  |  | 4,563 |
Depreciation expense |  |  | 537 |  |  |  | 538 |
Stock-based compensation |  |  | 5,078 |  |  |  | 4,660 |
Total operating expense |  |  | 57,405 |  |  |  | 28,572 |
Loss from operations |  |  | (57,405 | ) |  |  | (28,572 | )
Interest and other income, net |  |  | 3,049 |  |  |  | 3,396 |
Consolidated segment net loss |  | $ | (54,356 | ) |  | $ | (25,176 | )
__________________ (1) Research and development - external expenses include program expenses, other non-program specific expenses and other research expenses. (2) Other general and administrative expenses include consulting and professional services fees for legal, accounting, tax, and facilities costs.

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- Definition The entire disclosure for reporting segments including data and tables. 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