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Property, Equipment and Leasehold Improvements - Schedule of Property, Equipment and Leasehold Improvements (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Property Plant And Equipment [Line Items]
Total property, equipment and leasehold improvements	$ 32.8	$ 32.6
Less: accumulated depreciation and amortization	(26.7)	(25.6)
Property, equipment and leasehold improvements, net	6.1	7.0
Laboratory equipment
Property Plant And Equipment [Line Items]
Total property, equipment and leasehold improvements	20.8	20.6
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property, equipment and leasehold improvements	9.0	9.3
Office equipment
Property Plant And Equipment [Line Items]
Total property, equipment and leasehold improvements	$ 3.0	$ 2.7

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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