| Schedule of Significant Segment Expenses |
The Company identified the following significant segment expenses for its single reportable segment: | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | (in thousands) | 2025 | | 2024 | | 2025 | | 2024 | | Significant segment expenses: | | | | | | | | | Payroll-related expenses | $ | 7,946 | | | $ | 8,625 | | | $ | 16,969 | | | $ | 17,578 | | | Professional services and laboratory expenses | 3,240 | | | 4,732 | | | 6,429 | | | 9,928 | | | Facilities expenses | 2,827 | | | 2,655 | | | 5,839 | | | 5,416 | | | Stock-based compensation expense | 1,709 | | | 3,279 | | | 3,877 | | | 6,393 | | Other segment items (1) | 1,375 | | | 1,498 | | | 2,827 | | | 3,081 | | | Total operating expenses | $ | 17,097 | | | $ | 20,789 | | | $ | 35,941 | | | $ | 42,396 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | Footnotes: | | (1) | Other segment items for the Company’s single reportable segment include travel and entertainment, insurance, tax, expensed computer hardware and software, depreciation, and other miscellaneous expenses. |
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