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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 02, 2021
Jun. 26, 2020
Jul. 02, 2021
Jun. 26, 2020
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     4 years  
2019 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of common shares that may be issued (in shares) 840,360   840,360  
Common shares, issuance term     10 years  
Shares available for issuance (in shares) 490,329   490,329  
2010 and 2019 Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense $ 0.2 $ 0.2 $ 0.7 $ 0.5
2010 and 2019 Plans [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award expiration period     7 years  
ESPP [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of common shares that may be issued (in shares) 150,000   150,000  
Common shares, issuance term     10 years  
Shares available for issuance (in shares) 64,294   64,294