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INDEBTEDNESS (Narrative) (Details) - USD ($)
12 Months Ended
Sep. 30, 2022
Oct. 01, 2021
Line of Credit Facility [Line Items]    
Debt outstanding $ 0 $ 0
Financial Standby Letter of Credit    
Line of Credit Facility [Line Items]    
Letters of credit outstanding $ 173,000 $ 181,000
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Interest rate in effect 4.10% 1.10%
Revolving Credit Facility | Minimum | LIBOR    
Line of Credit Facility [Line Items]    
Margin range 1.00%  
Revolving Credit Facility | Maximum | LIBOR    
Line of Credit Facility [Line Items]    
Margin range 1.75%  
Revolving Credit Facility | Revolvers Borrowing Capacity Standard    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 75,000,000  
Accordion feature 50,000,000  
Aggregate borrowing amount 125,000  
Unsecured Line Of Credit    
Line of Credit Facility [Line Items]    
Long-term line of credit borrowings $ 0 $ 0