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Note C - Marketable Securities - Net Gains and Losses on Marketable Securities (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Net gains recognized during the period on marketable securities | $ 34,359 | $ 26,989
Less: Net losses realized on marketable securities sold during the period | 1,507 | 0
Net unrealized gains recognized during the reporting period on marketable securities still held at the reporting date | $ 35,866 | $ 26,989

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