XML 24 R57.htm IDEA: XBRL DOCUMENT

Note 9 - Share Based Stock Option Plans (Detail) - Summary of fair value assumptions for each option award:	12 Months Ended
	Jun. 30, 2012
Risk-free interest rate	1.87%
Expected life of options (in years)	6 years 3 months
Volatility	31.24%
Minimum [Member]
Risk-free interest rate	0.71%
Expected life of options (in years)	5 years 6 months
Volatility	29.53%

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.

+ References+ Details