Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance at Sep. 30, 2008	$ 253,722	$ 680,020	$ (2,083)	$ 549	$ (424,764)
Shares of common stock outstanding at Sep. 30, 2008		77,761
Increase (Decrease) in Shareholders' Equity
Net Loss	(138,801)				(138,801)
Foreign exchange translation adjustment	186			186
Share-based compensation (in shares)		756
Share-based compensation	7,858	7,858
Stock option exercises (in shares)		11
Stock option exercises	32	32
Issuance of common stock - ESPP (in shares)		995
Issuance of common stock - ESPP	894	894
Issuance of common stock for acquisitions (in shares)		1,300
Issuance of common stock related to equity line financing facility	40	40
Balance at Sep. 30, 2009	123,931	688,844	(2,083)	735	(563,565)
Shares of common stock outstanding at Sep. 30, 2009		80,823
Increase (Decrease) in Shareholders' Equity
Net Loss	(23,694)				(23,694)
Foreign exchange translation adjustment	42			42
Share-based compensation (in shares)		1,105
Share-based compensation	9,860	9,860
Stock option exercises (in shares)		2
Stock option exercises	1	1
Issuance of common stock - ESPP (in shares)		1,202
Issuance of common stock - ESPP	990	990
Issuance of common stock related to equity line financing facility (in shares)		2,055
Issuance of common stock related to equity line financing facility	2,302	2,302
Balance at Sep. 30, 2010	113,432	701,997	(2,083)	777	(587,259)
Shares of common stock outstanding at Sep. 30, 2010	85,187	85,187
Increase (Decrease) in Shareholders' Equity
Net Loss	(34,219)				(34,219)
Foreign exchange translation adjustment	135			135
Share-based compensation (in shares)		2,513
Share-based compensation	7,580	7,580
Stock option exercises (in shares)		231
Stock option exercises	320	320
Issuance of common stock - ESPP (in shares)		1,438
Issuance of common stock - ESPP	1,455	1,455
Issuance of common stock - ODPP (in shares)		37
Issuance of common stock - ODPP	80	80
Outstanding warrants valuation adjustment	(196)	(8,218)			8,022
Issuance of common stock from private placement transaction (in shares)		4,408
Issuance of common sotck from private placement transaction	9,653	9,653
Issuance of common stock related to equity line financing facility (in shares)		111
Issuance of common stock related to equity line financing facility	196	196
Balance at Sep. 30, 2011	$ 98,436	$ 713,063	$ (2,083)	$ 912	$ (613,456)
Shares of common stock outstanding at Sep. 30, 2011	93,925	93,925