Interest Expense

6 Months Ended

Jun. 30, 2022

Other Income and Expenses [Abstract]

Interest Expense

Interest Expense

The following details the composition of interest expense (dollars in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(unaudited)				(unaudited)
Interest expense	$	(1,175)	$	(4,498)	$	(2,330)	$	(9,560)
Interest expense on nonrecourse liability related to sale of future royalties	(635)		(969)		(1,422)		(2,004)
Total	$	(1,810)	$	(5,467)	$	(3,752)	$	(11,564)

For the three and six months ended June 30, 2022, interest expense includes noncash interest expense related to amortization of deferred financing costs of $0.5 million and $1.1 million. For the three and six months ended June 30, 2021, interest expense includes noncash interest expense related to amortization of deferred financing costs and amortization of the debt discount on the 2023 Notes of $4.3 million and $8.6 million.