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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 02, 2022
Jul. 03, 2021
Jul. 02, 2022
Jul. 03, 2021
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]        
Reserve for warranty, beginning of period $ 15,518 $ 15,574 $ 16,961 $ 9,576
Provision for warranty 2,842 4,325 9,001 15,654
Utilization of reserve (4,118) (3,004) (11,720) (8,335)
Reserve for warranty, end of period $ 14,242 $ 16,895 $ 14,242 $ 16,895