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Note C - Investment Securities (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021
Proceeds from Sale and Maturity of Marketable Securities | $ 9,716 | $ 12,026 | $ 60,891
Marketable Securities, Gain (Loss) | (700) | 300 | $ 200
Marketable Security, Unrealized Gain (Loss) | $ 700 | $ 300 |
Mutual Fund [Member] |  |  |
Marketable Securities, Annual Income, Percentage | 6.80% |  |
Preferred Stock [Member] |  |  |
Marketable Securities, Annual Income, Percentage | 6.10% |  |
Marketable Securities, Annual Income, Percentage, not Subject to Tax | 50.00% |  |
Corporate Bond Securities [Member] |  |  |
Marketable Securities, Annual Income, Percentage | 1.70% |  |

X
- Definition The annual income percentage generated by debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale. + References No definition available. + Details
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- Definition The percentage of annual income percentage from debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale that is not subject to tax. + References No definition available. + Details
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- Definition Amount of unrealized and realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI). + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) on investment in marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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