Property, Plant, and Equipment, net (Property, Plant, and Equipment, Net) (Details) (USD $)	Dec. 31, 2013	Sep. 30, 2013
Property, Plant and Equipment [Abstract]
Accumulated depreciation, depletion and amortization	$ 81,700,000	$ 79,900,000
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	48,678,000	49,744,000
Land
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	1,502,000	1,502,000
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	18,298,000	18,423,000
Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	22,290,000	23,134,000
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	88,000	95,000
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	899,000	933,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	2,831,000	3,029,000
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	$ 2,770,000	$ 2,628,000