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Financial Instruments (Tables) | 12 Months Ended
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Mar. 02, 2019
Marketable Securities [Abstract] |
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale |
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
March 2, 2019 |  | $ | 12,481 |  |  | $ | 59 |  |  | $ | (108 | ) |  | $ | 12,432 |
March 3, 2018 |  | 9,183 |  |  | 8 |  |  | (138 | ) |  | 9,053 |
Schedule of length of time that available-for-sale securities were in continuous unrealized loss positions | Financial assets and liabilities measured at fair value on a recurring basis were:
(In thousands) |  | Quoted Prices in Active Markets (Level 1) |  | Other Observable Inputs (Level 2) |  | Total Fair Value
March 2, 2019 |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |
Money market funds |  | $ | 2,015 |  |  | $ | — |  |  | $ | 2,015 |
Commercial paper |  | — |  |  | 300 |  |  | 300 |
Total cash equivalents |  | 2,015 |  |  | 300 |  |  | 2,315 |
Short-term securities |  |  |  |  |  |
Municipal and corporate bonds |  | — |  |  | 402 |  |  | 402 |
Long-term securities |  |  |  |  |  |
Municipal and corporate bonds |  | — |  |  | 12,030 |  |  | 12,030 |
Total assets at fair value |  | $ | 2,015 |  |  | $ | 12,732 |  |  | $ | 14,747 |
March 3, 2018 |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |
Money market funds |  | $ | 2,901 |  |  | $ | — |  |  | $ | 2,901 |
Commercial paper |  | — |  |  | 400 |  |  | 400 |
Total cash equivalents |  | 2,901 |  |  | 400 |  |  | 3,301 |
Short-term securities |  |  |  |  |  |
Municipal and corporate bonds |  | — |  |  | 423 |  |  | 423 |
Long-term securities |  |  |  |  |  |
Municipal and corporate bonds |  | — |  |  | 8,630 |  |  | 8,630 |
Total assets at fair value |  | $ | 2,901 |  |  | $ | 9,453 |  |  | $ | 12,354 |
Schedule of amortized cost and estimated fair values of investments by contractual maturity | The amortized cost and estimated fair values of our municipal and corporate bonds at March 2, 2019, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities, as borrowers may have the right to call or prepay obligations with or without penalty. Gross realized gains and losses were insignificant for all periods presented.
(In thousands) |  | Amortized Cost |  | Estimated Market Value
Due within one year |  | $ | 405 |  |  | $ | 402 |
Due after one year through five years |  | 9,479 |  |  | 9,439 |
Due after five years through 10 years |  | 1,834 |  |  | 1,834 |
Due after 10 years through 15 years |  | — |  |  | — |
Due beyond 15 years |  | 763 |  |  | 757 |
Total |  | $ | 12,481 |  |  | $ | 12,432 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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