Other Income (Expense) (Tables)

3 Months Ended

Mar. 31, 2020

Other Income and Expenses [Abstract]

Schedule of other income (expense)

Other income (expense) consist of the following (dollars in thousands):

	Three Months ended March 31,
	2020		2019
	(unaudited)
Interest income	$	5,777	$	4,681
Interest expense	(4,693)		(4,710)
Interest expense on nonrecourse liability related to sale of future royalties	(1,062)		(1,160)
Total	$	22	$	(1,189)