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Common Stock Transactions and Option Transactions (Detail) - Summary of Fair Value Measurements for Share-Based Compensation	9 Months Ended
	Jun. 30, 2013
Stockholders' Equity Note [Abstract]
Dividend yield	0.00%
Risk free interest rate	0.50%
Volatility	68.04%

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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