Property, Plant and Equipment (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 19,127,000	$ 16,993,000
Less accumulated depreciation	(11,029,000)	(9,961,000)
Property, Plant and Equipment, Net	8,098,000	7,032,000
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	158,000	161,000
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,591,000	3,474,000
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	14,086,000	12,318,000
Office furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,239,000	987,000
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 53,000	$ 53,000