Other Income (Expense)

3 Months Ended

Mar. 31, 2020

Other Income and Expenses [Abstract]

Other Income (Expense)

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)

Interest expense includes noncash interest expense related to amortization of deferred financing costs and amortization of the debt discount on the 2023 Notes of $4.1 million and $3.8 million for the three months ended March 31, 2020 and 2019, respectively.