Note 16 - Stock Based Compensation (Detail) - The Fair Value of Each Option Award	12 Months Ended
Dec. 31, 2010
Risk-free interest rate	2.11%
Expected option life (years)	7 years
Expected stock price volatility	44.70%
Dividend yield	0.70%

- 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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