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Nature Of Business And Summary Of Significant Accounting Policies (Schedule Of Fair Value Assumptions For Stock Option Plan) (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Fair Value Option [Line Items]
Risk free interest rate	1.05%	1.96%	3.22%
Expected volatility	59.00%	47.00%	49.00%
Expected life of options	5 years 5 months 19 days	6 years 7 months 10 days	7 years
Dividend yield	$ 0	$ 0	$ 0

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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