Interest Expense (Tables)

6 Months Ended

Jun. 30, 2022

Other Income and Expenses [Abstract]

Schedule of 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)