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Note L - Convertible Senior Notes - Schedule of Carrying Value of Convertible Senior Notes (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Mar. 05, 2019
Net carrying amount $ 78,680 $ 77,854  
The 5% Convertible Senior Notes Due 2024 [Member]      
Principal 80,500   $ 80,500
Unamortized debt issuance costs (1,820)    
Net carrying amount $ 78,680