Note 6 - Intangibles - Intangibles (Details) - USD ($)	Apr. 01, 2017	Oct. 01, 2016
Intangible assets, gross	$ 5,137,811	$ 5,288,911
Less accumulated amortization	(3,275,514)	(3,299,012)
Intangibles, net	1,862,297	1,989,899
Patents and Trademarks [Member]
Intangible assets, gross	2,307,428	2,268,402
Trade Names [Member]
Intangible assets, gross	338,945	343,678
Noncompete Agreements [Member]
Intangible assets, gross		150,601
Customer Relationships [Member]
Intangible assets, gross	$ 2,491,438	$ 2,526,230

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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