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Financial Instruments (Details 2) - Municipal bonds - USD ($) $ in Thousands | Feb. 25, 2023 | Feb. 26, 2022
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost, Due within one year | $ 2,205 |
Amortized Cost, Due after one year through five years | 8,442 |
Amortized Cost | 10,647 | $ 11,862
Estimated Market Value, Due within one year | 2,173 |
Estimated Market Value, Due after one year through five years | 7,772 |
Estimated Fair Value | $ 9,945 | $ 11,784

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