Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Depreciation, Total	$ 11,600,000	$ 10,500,000	$ 10,400,000
Interest Costs Capitalized	0	0	0
Goodwill, Impairment Loss	0
Asset Impairment Charges, Total	$ 0	$ 0	20,000
Impairment of Long-Lived Assets Held-for-use			$ 20,000
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	15 years
Building [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	10 years
Building [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	30 years
Land Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Land Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	15 years

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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