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Note D - Marketable Equity Securities - Realized Gains on Marketable Equity Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sales proceeds $ 0 $ 72 $ 0 $ 1,496
Cost of securities sold 0 19 0 560
Realized gain $ 0 $ 53 $ 0 $ 936