LEASES - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Leases [Abstract]
Operating lease expense - occupancy expenses	$ 2,899	$ 2,088	$ 6,836	$ 7,005
Occupancy lease expense - general and administrative expenses	118	158	270	481
Variable lease expense	158	132	1,553	2,500
Total lease expense	$ 3,175	$ 2,378	$ 8,659	$ 9,986