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Basis of Presentation and Significant Accounting Policies (Details 2)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Fair value of each option grant is estimated
Risk-free interest rate	0.40%
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Fair value of each option grant is estimated
Expected life	4 years 8 months 12 days	4 years 4 months 24 days
Risk-free interest rate		0.40%
Expected volatility	51.40%	68.20%
Expected forfeiture rate	0.120	0.128
Expected exercise factor	1.34	1.15
Maximum [Member]
Fair value of each option grant is estimated
Expected life	4 years 9 months 18 days	4 years 9 months 18 days
Risk-free interest rate		1.40%
Expected volatility	64.00%	83.00%
Expected forfeiture rate	0.131	0.177
Expected exercise factor	1.36	1.32

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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