Property, Equipment and Leasehold Improvements - Schedule of Property, Equipment and Leasehold Improvements (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Property Plant And Equipment [Line Items] | ||
| Total property, equipment and leasehold improvements | $ 34.3 | $ 33.4 |
| Less: accumulated depreciation and amortization | (29.7) | (28.2) |
| Property, equipment and leasehold improvements, net | 4.6 | 5.2 |
| Laboratory equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property, equipment and leasehold improvements | 22.0 | 21.3 |
| Leasehold improvements | ||
| Property Plant And Equipment [Line Items] | ||
| Total property, equipment and leasehold improvements | 9.1 | 9.1 |
| Office equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property, equipment and leasehold improvements | $ 3.2 | $ 3.0 |
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- Definition Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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