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RECEIVABLES AND CONCENTRATION OF CREDIT RISK (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Jul. 04, 2021
Sep. 30, 2020
Receivables [Line Items]    
Allowance for uncollectible receivables $ 6.4 $ 6.4
Two Customers | Trade Receivables | Customer Concentration Risk    
Receivables [Line Items]    
Concentration risk percentage 26.00% 28.40%