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Note 9 - Share-Based Compensation (Detail) - Schedule of weighted-average option fair values and valuation assumptions (USD $)	3 Months Ended
	Jun. 26, 2011
Weighted-average option fair values (in Dollars per share)	$ 5.039
Expected life (years)	5 years
Interest rate	1.60%
Volatility	28.90%
Dividend yield	0.00%

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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