Note 9 - Information on Industry Segments (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Operating profit (loss) before corporate expense:
Operating profit	$ 924,797	$ 1,340,791	$ 2,268,862	$ 2,345,803
Other income (expense)	171,641	15,890	237,901	22,008
Income before income taxes	1,096,438	1,356,681	2,506,763	2,367,811
Medical [Member] | Operating Segments [Member]
Net sales:
Net sales	11,105,935	11,184,394	23,938,580	21,768,573
Operating profit (loss) before corporate expense:
Operating profit	1,215,146	1,351,453	3,000,320	2,171,485
Custom Products [Member] | Operating Segments [Member]
Net sales:
Net sales	3,927,683	3,524,135	6,815,713	7,793,233
Operating profit (loss) before corporate expense:
Operating profit	(69,473)	192,478	(345,654)	481,671
Corporate Segment [Member]
Operating profit (loss) before corporate expense:
Corporate expense	(220,876)	(203,140)	(385,804)	(307,353)
Operating Segments [Member]
Net sales:
Net sales	15,033,618	14,708,529	30,754,293	29,561,806
Operating profit (loss) before corporate expense:
Operating profit	$ 1,145,673	$ 1,543,931	$ 2,654,666	$ 2,653,156