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Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 02, 2019 | Mar. 03, 2018
--- | --- | ---
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale |  |
Amortized Cost | $ 12,481 | $ 9,183
Gross Unrealized Gains | 59 | 8
Gross Unrealized Losses | (108) | (138)
Estimated Fair Value | 12,432 | $ 9,053
Municipal bonds |  |
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale |  |
Amortized Cost | 12,481 |
Estimated Fair Value | $ 12,432 |

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