Financial Instruments (Details) - USD ($) $ in Thousands	May 29, 2021	Feb. 27, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 12,372
Estimated Fair Value	12,749
Municipal and Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,372	$ 12,517
Gross Unrealized Gains	384	386
Gross Unrealized Losses	7	10
Estimated Fair Value	$ 12,749	$ 12,893

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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