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Leases
 9 Months Ended
Sep. 30, 2024
Leases [Abstract]  
Leases Leases
The Company is the lessee for operating leases for offices, R&D facilities and manufacturing facilities. The Company determines if an arrangement is a lease at inception. Operating leases are included in right-of-use assets and liabilities. For a discussion of lessor activities, see Note 12, “Revenue recognition.”
The components of lease expense were as follows: 
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Operating lease cost:
Amortization of right-of-use assets$0.7 $1.1 $2.5 $3.1 
Interest on lease liabilities0.2 0.2 0.6 0.6 
Total operating lease cost$0.9 $1.3 $3.1 $3.7 
Operating lease costs are reflected as components of “Cost of Commercial Product sales”, “Cost of MCM Product sales”, “Cost of Bioservices”, “R&D” expense and “SG&A” expense on the Company's Condensed Consolidated Statements of Operations.
Supplemental balance sheet information related to lessee activities is as follows:
LeasesClassificationSeptember 30, 2024December 31, 2023
Operating lease right-of-use assetsOther assets$12.4 $16.2 
Operating lease liabilities, current portionOther current liabilities$2.7 $3.5 
Operating lease liabilitiesOther liabilities10.7 13.8 
Total operating lease liabilities$13.4 $17.3 
Operating leases:
Weighted average remaining lease term (years)6.06.2
Weighted average discount rate5.5 %5.3 %