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Property, Equipment and Leasehold Improvements (Tables)
12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of property, equipment and leasehold improvements
Property, equipment and leasehold improvements consist of the following:
December 31,
(dollars in millions)20222021
Laboratory equipment$17.1 $13.6 
Office equipment2.0 1.4 
Leasehold improvements10.9 8.4 
Total property, equipment and leasehold improvements30.0 23.4 
Less: accumulated depreciation and amortization(16.6)(10.7)
Property, equipment and leasehold improvements, net$13.4 $12.7