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Interest Expense
 12 Months Ended
Dec. 31, 2024
Other Income and Expenses [Abstract]  
Interest Expense Interest Expense
Interest expense consists of the following (dollars in thousands):
Year Ended December 31,
202420232022
Interest expense$— $(1,321)$(2,542)
Interest expense on nonrecourse liability related to sale of future royalties— (562)(2,416)
Noncash interest expense on debt— (532)(2,112)
Total$— $(2,415)$(7,070)
Noncash interest expense on debt is related to amortization of deferred financing costs on the 2023 Notes. The Company fully amortized the deferred financing costs on the 2023 Notes in the first quarter of 2023. (see Note 8, Debt).