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Note 13 - Investments - Held-to-maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 25, 2023 | Sep. 24, 2022
--- | --- | ---
Due in one year or less, amortized cost | $ 0 | $ 4,011
Due in one year or less, fair market value | 0 | 3,990
Due after one year through five years, amortized cost | 0 | 0
Due after one year through five years, fair market value | 0 | 0
Due after five years through ten years, amortized cost | 0 | 0
Due after five years through ten years, fair market value | 0 | 0
Total held to maturity securities, amortized cost | 0 | 4,011
Held-to-maturity securities, fair market value | 0 | 3,990
Marketable securities held to maturity | 0 | 4,011
Less current portion, fair market value | 0 | 3,990
Long term held to maturity securities, amortized cost | 0 | 0
Long term held to maturity securities, fair market value | $ 0 | $ 0

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