Note 9 - Operations and Industry Segments - Information On Industry Segments (Details) - USD ($)	3 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Operating profit	$ 1,391,240	$ 1,556,455
Corporate expense	4,175,263	3,926,845
Other income	33,652	108,297
Income before income taxes	1,424,892	1,664,752
Operating Segments [Member]
Net sales	15,222,630	21,452,182
Operating profit	1,593,264	1,706,651
Corporate, Non-Segment [Member]
Corporate expense	(202,024)	(150,196)
Medical [Member] | Operating Segments [Member]
Net sales	12,518,152	11,392,797
Operating profit	1,606,445	1,501,851
Custom Products [Member] | Operating Segments [Member]
Net sales	2,704,478	10,059,385
Operating profit	$ (13,181)	$ 204,800