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Financial Instruments (Details) - USD ($) $ in Thousands | Aug. 28, 2021 | Feb. 27, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 12,399 |
Estimated Fair Value | 12,782 |
Municipal and Corporate Bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 12,399 | $ 12,517
Gross Unrealized Gains | 385 | 386
Gross Unrealized Losses | 2 | 10
Estimated Fair Value | $ 12,782 | $ 12,893

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