Property, Plant, and Equipment, net (Schedule of Property, Plant, and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 31,781		$ 30,554
Accumulated depreciation	(22,051)		(21,629)
Property, plant, and equipment, net	9,730	$ 8,925	8,925
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	25,207		24,913
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		2,177
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,517		1,480
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,771		$ 875