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Note D - Marketable Equity Securities - Unrealized Gains and Losses on Marketable Equity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Gross unrealized gains $ 18,717 $ 17,215
Gross unrealized losses 1,875 1,689
Net unrealized gain $ 16,842 $ 15,526