CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in-Capital [Member]	Accumulated Deficit [Member]	Total Stockholders' Equity
Balance at Sep. 30, 2013	$ 15,908	$ 575	$ 1,891,661	$ (1,876,328)	$ 15,908
Balance (in shares) at Sep. 30, 2013		57,545,000
Increase (Decrease) in Stockholders' Equity
Net loss	(15,590)				(15,590)
Compensation expense related to stock options, awards and Employee Stock Purchase Plan			4,466		4,466
Stock Issued During Period, Shares, Exercise of Stock Options		49,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Issuance of Common Stock Upon Exercise			114		114
Stock Issued During Period, Shares, Employee Stock Purchase Plans		366,000
Stock Issued During Period, Value, Employee Stock Purchase Plan		4	905		909
Issuance of common stock, net of offering costs (in shares)		8,582,000
Issuance of common stock, net of offering costs		86	26,519		26,605
Release of restricted stock units (in shares)		1,179,000
Release of restricted stock units		12	(12)
Repurchase and retirement of restricted stock units for payroll taxes (in shares)		(379,000)
Repurchase and retirement of restricted stock units for payroll taxes		(4)	(1,247)		(1,251)
Other			62		62
Balance at Jun. 30, 2014	$ 31,223	$ 673	$ 1,922,468	$ (1,891,918)	$ 31,223
Balance (in shares) at Jun. 30, 2014		67,342,000