Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Defined Benefit Plan, Expected Future Benefit Payment, Year One		$ 255,000
Depreciation, Total		13,200,000	$ 12,500,000	$ 11,600,000
Interest Costs Capitalized		0	0	0
Goodwill, Impairment Loss		0
Asset Impairment Charges, Total		$ 343,000	$ 0	$ 0
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		5 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		15 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		30 years
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		15 years
Forecast [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 843,000
Decrease in Assumed Discount Rate [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		0.25%
Defined Benefit Plan, Increase of Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets		$ 320,000
Defined Benefit Plan, Increase in Accumulated Benefit Obligation		277,000
Defined Benefit Plan, Increase in Expected Net Periodic Benefit Cost (Credit), Next Twelve Months		$ 35,000