Financial Instruments (Details 2) - USD ($) $ in Thousands	Feb. 29, 2020	Mar. 02, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 11,692	$ 12,481
Estimated Fair Value	11,967	$ 12,432
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost, Due within one year	807
Amortized Cost, Due after one year through five years	6,825
Amortized Cost, Due after five years through 10 years	4,060
Amortized Cost	11,692
Estimated Market Value, Due within one year	809
Estimated Market Value, Due after one year through five years	6,998
Estimated Market Value, Due after five years through 10 years	4,160
Estimated Fair Value	$ 11,967

Amortized cost 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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