Property, Plant, and Equipment, net (Schedule of Property, Plant, and Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 30,554	$ 31,945
Accumulated depreciation	(21,629)	(21,499)
Property, plant, and equipment, net	8,925	10,446
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	24,913	23,185
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,109	1,109
Computer hardware and software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	2,177	2,026
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,480	5,576
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 875	$ 49