Property, Plant and Equipment (Summary of Original Cost of Property, Plant and Equipment) (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Property, plant and equipment, gross	$ 13,199,649	$ 12,964,883
Accumulated depreciation	(10,851,124)	(10,466,020)
Property, plant and equipment, net	2,348,525	2,498,863
Buildings and improvements [Member]
Property, plant and equipment, gross	4,259,266	4,252,354
Machinery and equipment [Member]
Property, plant and equipment, gross	8,735,432	8,506,662
Land [Member]
Property, plant and equipment, gross	45,000	45,000
Furniture and fixtures [Member]
Property, plant and equipment, gross	$ 159,951	$ 160,867