LEASES - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Leases [Abstract]
Operating lease expense - occupancy expenses	$ 2,217	$ 2,524
Occupancy lease expense - general and administrative expenses	41	157
Variable lease expense	439	1,756
Total lease expense	$ 2,697	$ 4,437