Description of Business (Liquidity and Capital Resources) (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 16,104,000				$ 9,047,000				$ 16,104,000	$ 9,047,000	$ 15,598,000	$ 19,944,000
Working capital	37,200,000								37,200,000
Net income (loss)	(2,252,000)	(7,283,000)	11,697,000	2,826,000	(6,568,000)	(9,039,000)	(9,335,000)	(14,229,000)	4,988,000	(39,171,000)	(34,219,000)
Net cash (used in) provided by operating activities									$ (22,105,000)	$ (15,002,000)	$ (6,289,000)