Basis of Presentation - Equity Facility (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended
	Jun. 30, 2012
Equity Facility:
Maximum draw-down amount	$ 50
Term (in years)	2
Draw-down transaction restriction, minimum common stock price (per share)	$ 4
Number of completed draw-down transactions (in ones)	0