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Note D - Marketable Equity Securities - Realized Gains on Marketable Equity Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Sales proceeds $ 0 $ 760 $ 0 $ 1,421
Cost of securities sold 0 418 0 540
Realized gain / (loss) $ 0 $ 342 $ 0 $ 881