Leases

9 Months Ended

Sep. 30, 2022

The Company is the lessee for operating leases for offices, research and development facilities and manufacturing facilities. The Company determines if an arrangement is a lease at inception. Operating leases are included in right-of-use (ROU) assets and liabilities. For a discussion of lessor activities, see Note 10, "Revenue recognition".

The components of lease expense were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost:
Amortization of right-of-use assets	$	1.4	$	1.4	$	4.2	$	4.2
Interest on lease liabilities	0.3		0.3		0.8		1.0
Total operating lease cost	$	1.7	$	1.7	$	5.0	$	5.2

Operating lease costs are reflected as components of cost of product sales, cost of contract development and manufacturing, research and development expense and selling, general and administrative expense.

Supplemental balance sheet information related to lessee activities is as follows:


(In millions, except lease term and discount rate)	Balance Sheet Location	September 30, 2022			December 31, 2021
Operating lease right-of-use assets	Other assets	$	20.5		$	28.3

Operating lease liabilities, current portion	Other current liabilities	5.7			5.8
Operating lease liabilities	Other liabilities	15.8			24.2
Total operating lease liabilities		$	21.5		$	30.0

Operating leases:
Weighted average remaining lease term (years)		5.9			7.0
Weighted average discount rate		4.0		%	4.1		%

During the three months ended September 30, 2022, the Company exercised the option to purchase our Rockville manufacturing facility. As a result, the Company removed the related operating lease right-of-use asset and operating lease liability of $3.5 million and $3.4 million, respectively. The purchased assets have been properly included in "Property, plant and equipment, net" on our condensed consolidated balance sheet as of September 30, 2022.