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Note C - Marketable Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Notes Tables |
Gain (Loss) on Securities [Table Text Block] |
|  | Years ended December 31, |
|  | 2025 |  |  | 2024 |
Net gains recognized during the year on marketable securities |  | $ | 34,359 |  |  | $ | 26,989 |
Less: Net losses realized during the year on marketable securities sold during the period |  |  | 1,507 |  |  |  | --- |
Net unrealized gains recognized during the reporting year on marketable securities still held at the reporting date |  | $ | 35,866 |  |  | $ | 26,989 |
Marketable Securities [Table Text Block] |
|  | Cost |  |  | Fair Value |  |  | Unrealized Gain |
Equity Securities: |  |  |  |  |  |  |  |  |  |  |  |
Equity and other mutual funds |  | $ | 713,120 |  |  | $ | 777,963 |  |  | $ | 64,843 |
Other short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Bills (original maturities > 3 months) |  |  | 6,544,683 |  |  |  | 6,544,683 |  |  |  | --- |
Total marketable securities |  | $ | 7,257,803 |  |  | $ | 7,322,646 |  |  | $ | 64,843 |
|  | Cost |  |  | Fair Value |  |  | Unrealized Gain |
Equity Securities: |  |  |  |  |  |  |  |  |  |  |  |
Equity and other mutual funds |  | $ | 634,705 |  |  | $ | 663,682 |  |  | $ | 28,977 |
Other short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
Fixed income Certificates of Deposit (original maturities > 3 months) |  |  | 570,000 |  |  |  | 570,000 |  |  |  | --- |
U.S. Treasury Bills (original maturities > 3 months) |  |  | 6,288,943 |  |  |  | 6,288,943 |  |  |  | --- |
Total other short-term investments |  | $ | 6,858,943 |  |  | $ | 6,858,943 |  |  | $ | --- |
Total marketable securities |  | $ | 7,493,648 |  |  | $ | 7,522,625 |  |  | $ | 28,977 |

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- Definition Tabular disclosure of realized and unrealized gain (loss) on investment in security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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