Note 5 - Property and Equipment - Property and Equipment (Details) - USD ($)	Apr. 01, 2017	Oct. 01, 2016
Property, plant and equipment, gross	$ 18,375,776	$ 18,089,896
Less accumulated depreciation	14,316,932	13,973,826
Property and equipment, net	4,058,844	4,116,070	[1]
Land [Member]
Property, plant and equipment, gross	469,718	469,718
Land Improvements [Member]
Property, plant and equipment, gross	486,698	486,698
Building [Member]
Property, plant and equipment, gross	7,018,079	7,003,652
Machinery and Equipment [Member]
Property, plant and equipment, gross	9,828,208	9,563,061
Furniture and Fixtures [Member]
Property, plant and equipment, gross	526,149	506,277
Construction in Progress [Member]
Property, plant and equipment, gross	32,788	36,637
Automobiles [Member]
Property, plant and equipment, gross	$ 14,136	$ 23,853

[1] The Balance Sheet at October 1, 2016, has been derived from the audited financial statements at that date.