Financial Instruments (Details) - USD ($) $ in Thousands	Feb. 26, 2022	Feb. 27, 2021
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	$ 11,862	$ 12,517
Gross Unrealized Gains	45	386
Gross Unrealized Losses	123	10
Estimated Fair Value	11,784	$ 12,893
Municipal bonds
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	11,862
Estimated Fair Value	$ 11,784

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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