Summary of Significant Accounting Policies and Select Balance Sheet Information (Details 4) (USD $) In Thousands, unless otherwise specified							12 Months Ended				12 Months Ended				12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Land [Member]	Sep. 30, 2011 Land [Member]	Sep. 30, 2012 Laboratory Fixtures and Equipment [Member]	Sep. 30, 2011 Laboratory Fixtures and Equipment [Member]	Sep. 30, 2012 Laboratory Fixtures and Equipment [Member] Maximum [Member]	Sep. 30, 2012 Laboratory Fixtures and Equipment [Member] Minimum [Member]	Sep. 30, 2012 Buildings and improvements [Member]	Sep. 30, 2011 Buildings and improvements [Member]	Sep. 30, 2012 Buildings and improvements [Member] Maximum [Member]	Sep. 30, 2012 Buildings and improvements [Member] Minimum [Member]	Sep. 30, 2012 Office Furniture and Equipment [Member]	Sep. 30, 2011 Office Furniture and Equipment [Member]	Sep. 30, 2012 Office Furniture and Equipment [Member] Maximum [Member]	Sep. 30, 2012 Office Furniture and Equipment [Member] Minimum [Member]	Sep. 30, 2012 Construction-in-Progress [Member]	Sep. 30, 2011 Construction-in-Progress [Member]
Components of Property, Plant and Equipment
Property and Equipment, Useful Life							10 years	3 years			20 years	3 years			10 years	3 years
Property and Equipment, Gross			$ 4,359	$ 4,359	$ 13,004	$ 13,236			$ 14,702	$ 14,655			$ 3,370	$ 3,222			$ 848	$ 237
Less accumulated depreciation	(22,673)	(21,123)
Property and equipment, net	$ 13,610	$ 14,586