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Note L - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Amortization of debt issuance costs $ 2,308 $ 902 $ 865
The 5% Convertible Senior Notes Due 2024 [Member]      
Contractual interest expense 4,039 4,025  
Amortization of debt issuance costs 849 826  
Total interest cost $ 4,888 $ 4,851  
Effective interest rate 5.10% 5.10%