Note 8 - Stock-Based Compensation (Details) - Assumptions Used to Estimate the Black-Scholes Fair Value of Stock Options Granted
 3 Months Ended
May. 30, 2015
May. 31, 2014
Assumptions Used to Estimate the Black-Scholes Fair Value of Stock Options Granted [Abstract]    
Weighted Average Expected Life (in years) (2) [1],[2] 6 years 255 days 6 years 219 days
Weighted Average Expected Volatility (3) [1],[3] 27.59% 28.31%
Weighted Average Risk Free Interest Rates (4) [1],[4] 1.93% 2.11%
Expected Dividend Yield [1]    
[1] Forfeitures are estimated based on historical experience.
[2] The expected life of stock options is estimated based on historical experience.
[3] Expected volatility is based on the average of historical and implied volatility. The historical volatility is determined by observing actual pricesof the Company's stock over a period commensurate with the expected life of the awards. The implied volatility represents the implied volatility ofthe Company's call options, which are actively traded on multiple exchanges, had remaining maturities in excess of twelve months, had marketprices close to the exercise prices of the employee stock options and were measured on the stock option grant date.
[4] Based on the U.S. Treasury constant maturity interest rate whose term is consistent with the expected life of the stock options.