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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 02, 2022
Apr. 03, 2021
Apr. 02, 2022
Apr. 03, 2021
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]        
Reserve for warranty, beginning of period $ 17,110 $ 12,136 $ 16,961 $ 9,576
Provision for warranty 2,191 6,029 6,159 11,329
Utilization of reserve (3,783) (2,591) (7,602) (5,331)
Reserve for warranty, end of period $ 15,518 $ 15,574 $ 15,518 $ 15,574