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Common Stock (Detail) - Share-based compensation using the Black-Scholes fair value option-pricing Model	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Risk free interest rate	2.30%	2.20%	2.30%	1.90%
Expected dividend yield
Volatility	201.70%	209.30%	201.10%	211.80%
Expected life in years	5 years	5 years	5 years	5 years

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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