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Segment data (Tables) | 6 Months Ended
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Jun. 30, 2026
Segment Reporting [Abstract] |
Schedule of Company's reportable segment net revenues and loss | The Company's reportable segment net revenues and (loss) income for the three and six months ended June 30, 2026 and 2025 consisted of the following (in thousands):
|  | Three months ended June 30, |  |  | Six months ended June 30, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Revenue: |  |  |  |  |  |  |  |  |  |  |  |
Collaboration revenue |  | $ | 8,968 |  |  | $ | 23,194 |  |  | $ | 13,178 |  |  | $ | 108,123 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
Research and development: |  |  |  |  |  |  |  |  |  |  |  |
External research and development expenses: |  |  |  |  |  |  |  |  |  |  |  |
MRT-2359 |  |  | 3,520 |  |  |  | 2,243 |  |  |  | 5,901 |  |  |  | 4,187 |
MRT-6160 |  |  | 16 |  |  |  | 1,477 |  |  |  | 27 |  |  |  | 5,458 |
MRT-8102 |  |  | 8,660 |  |  |  | 1,623 |  |  |  | 15,441 |  |  |  | 3,081 |
CCNE1 |  |  | 1,621 |  |  |  | 716 |  |  |  | 3,324 |  |  |  | 1,478 |
Other development and discovery programs |  |  | 9,796 |  |  |  | 4,986 |  |  |  | 19,384 |  |  |  | 9,450 |
Personnel expense |  |  | 13,901 |  |  |  | 11,758 |  |  |  | 27,394 |  |  |  | 23,110 |
Overhead and administrative expense |  |  | 10,450 |  |  |  | 7,850 |  |  |  | 20,562 |  |  |  | 16,079 |
General and administrative expenses: |  |  |  |  |  |  |  |  |  |  |  |
Personnel expense |  |  | 6,649 |  |  |  | 5,479 |  |  |  | 13,069 |  |  |  | 11,158 |
Professional services |  |  | 1,702 |  |  |  | 1,050 |  |  |  | 3,845 |  |  |  | 2,528 |
Facility costs and other expense |  |  | 1,783 |  |  |  | 1,566 |  |  |  | 3,395 |  |  |  | 3,112 |
Interest and other income, net |  |  | 5,941 |  |  |  | 4,458 |  |  |  | 11,524 |  |  |  | 8,129 |
Income tax provision |  |  | (208 | ) |  |  | (1,199 | ) |  |  | (260 | ) |  |  | (2,021 | )
Net (loss) income |  | $ | (43,397 | ) |  | $ | (12,295 | ) |  | $ | (87,900 | ) |  | $ | 34,590 |

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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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