Description of Business - Liquidity and Capital Resources (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 20,687,000				$ 16,104,000				$ 20,687,000	$ 16,104,000	$ 9,047,000	$ 15,598,000
Working capital	30,900,000								30,900,000
Net income (loss)	15,488,000	(3,150,000)	(5,432,000)	(2,054,000)	(2,252,000)	(7,283,000)	11,697,000	2,826,000	4,852,000	4,988,000	(39,171,000)
Net cash provided by operating activities									$ 1,001,000	$ (22,105,000)	$ (15,002,000)