INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Deferred tax assets:
State net operating loss carryforwards	$ 4,406	$ 4,141
Operating lease deferred credits	422	513
Deferred compensation	313	364
Tax credits	1,253	802
Partnership investments	347	0
Other	0	98
Deferred tax assets, before valuation allowance	6,741	5,918
Valuation allowance	(392)	(311)
Deferred tax assets, net of valuation allowance	6,349	5,607
Deferred tax liabilities:
Depreciation and amortization	(2,049)	(2,080)
Partnership investments	0	(329)
Prepaid expenses	(194)	(210)
Deferred tax liabilities	(2,243)	(2,619)
Net deferred tax assets	$ 4,106	$ 2,988