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Interest Expense (Tables)
 12 Months Ended
Dec. 31, 2022
Other Income and Expenses [Abstract]  
Schedule of other (expenses) income consists of the following (dollars in thousands):
Years Ended December 31,
202220212020
Interest expense$4,654 $19,696 $19,435 
Interest expense on nonrecourse liability related to sale of future royalties2,416 3,727 4,319 
Total$7,070 $23,423 $23,754