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Note D - Marketable Equity Securities - Unrealized Gains and Losses on Marketable Equity Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Gross unrealized gains $ 16,443 $ 15,539
Gross unrealized losses 1,930 2,630
Unrealized gain $ 14,513 $ 12,909