Note 5 - Stock-based Compensation - Fair Value Assumptions (Details) - $ / shares	12 Months Ended
Mar. 01, 2020	Mar. 03, 2019	Feb. 25, 2018
Weighted average fair value per share of option grants (in dollars per share)	$ 3.97	$ 3.66
Risk-free interest rates		2.83%
Expected stock price volatility		24.70%
Expected dividend yields	2.43%	2.32%
Estimated option terms (Years) (Year)		5 years 73 days
Minimum [Member]
Weighted average fair value per share of option grants (in dollars per share)	$ 3.75
Risk-free interest rates	2.24%
Expected stock price volatility	30.40%
Estimated option terms (Years) (Year)	4 years 109 days
Maximum [Member]
Weighted average fair value per share of option grants (in dollars per share)	$ 4.03
Risk-free interest rates	2.26%
Expected stock price volatility	31.50%
Estimated option terms (Years) (Year)	5 years 292 days

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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