v3.22.2.2
Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Oct. 03, 2020
Depreciation, Total   $ 13,700,000 $ 13,600,000 $ 13,200,000
Interest Costs Capitalized   0 0 0
Goodwill, Impairment Loss   0 0 0
Asset Impairment Charges, Total   $ 0 $ 1,415,000 $ 343,000
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   10 years    
Land Improvements [Member] | Maximum [Member]        
Property, Plant and Equipment, Useful Life   20 years    
Forecast [Member]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ 864,000      
Defined Benefit Plan, Expected Future Benefit Payment 560,000      
Defined Benefit Plan, Increase in Expected Net Periodic Benefit Cost (Credit), Next Twelve Months $ 30,000      
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   $ 297,000    
Defined Benefit Plan, Increase in Accumulated Benefit Obligation   $ 244,000