Equity (Schedule of Valuation Assumptions) (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Black-Scholes weighted average assumptions:
Expected dividend rate	0.00%	0.00%	0.00%	0.00%
Expected stock price volatility rate	96.70%	104.20%	96.80%	104.40%
Risk-free interest rate	1.30%	0.80%	1.10%	0.80%
Expected term	6 years	5 years	6 years	5 years
Weighted average grant date fair value per share of stock option granted: (in dollars per share)	$ 2.98	$ 3.04	$ 3.45	$ 3.09