Description of Business (Liquidity and Capital Resources) (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 5,922,000	$ 24,112,000	$ 5,922,000	$ 24,112,000	$ 9,047,000	$ 15,598,000
Working capital	28,700,000		28,700,000
Net income (loss)	11,697,000	(9,335,000)	14,523,000	(23,564,000)
Net cash (used in) provided by operating activities			$ (10,198,000)	$ 10,955,000