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Note C - Investment Securities - Summary of Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 24, 2022
--- | --- | ---
Held-to-maturity securities, amortized cost | $ 4,011 |
Marketable securities available for sale, amortized cost |  | $ 6,404
Held-to-maturity securities, gross unrealized gains | 0 |
Marketable securities available for sale, gross unrealized gains |  | 46
Held-to-maturity securities, gross unrealized losses | 21 |
Marketable securities available for sale, gross unrealized losses |  | 742
Held-to-maturity securities, fair market value | 3,990 | 3,990
Marketable securities available for sale, fair market value |  | 5,708
Corporate Bond Securities [Member] |  |
Held-to-maturity securities, amortized cost | 4,011 |
Held-to-maturity securities, gross unrealized gains | 0 |
Held-to-maturity securities, gross unrealized losses | 21 |
Held-to-maturity securities, fair market value | $ 3,990 |
Mutual Funds [Member] |  |
Marketable securities available for sale, amortized cost |  | 3,588
Marketable securities available for sale, gross unrealized gains |  | 0
Marketable securities available for sale, gross unrealized losses |  | 742
Marketable securities available for sale, fair market value |  | 2,846
Preferred Stock [Member] |  |
Marketable securities available for sale, amortized cost |  | 2,816
Marketable securities available for sale, gross unrealized gains |  | 46
Marketable securities available for sale, gross unrealized losses |  | 0
Marketable securities available for sale, fair market value |  | $ 2,862

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- Definition Accumulated amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A + Details
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