SEGMENT INFORMATION - Schedule of Segment Net Loss, Including Significant Segment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 28, 2026	Mar. 29, 2025	Dec. 28, 2024	Mar. 28, 2026	Mar. 29, 2025
REVENUES:
Total revenues	$ 36,584	$ 39,725		$ 77,333	$ 84,714
COSTS AND EXPENSES:
Payroll expenses	13,647	14,415		27,856	30,823
Other operating costs and expenses	5,076	5,584		10,393	11,384
General and administrative expenses	2,368	3,322		5,544	6,470
Depreciation and amortization	582	701		1,193	1,479
Goodwill impairment	0	3,440		0	3,440
(Gain) loss on closure of El Rio Grande	0	(140)		0	5
Gain on termination of Tampa Food Court lease	0	0	$ (5,235)	0	(5,235)
Provision (benefit) for income taxes	(6)	4,434		52	4,938
CONSOLIDATED NET LOSS	(1,693)	(9,144)		(591)	(4,069)
Operating Segments | Reportable Segment
REVENUES:
Total revenues	36,584	39,725		77,333	84,714
COSTS AND EXPENSES:
Payroll expenses	13,647	14,415		27,856	30,823
Other operating costs and expenses	5,076	5,584		10,393	11,384
General and administrative expenses	2,368	3,322		5,544	6,470
Depreciation and amortization	582	701		1,193	1,479
Goodwill impairment	0	3,440		0	3,440
(Gain) loss on closure of El Rio Grande	0	(140)		0	5
Gain on termination of Tampa Food Court lease	0	0		0	(5,235)
Interest expense, net	49	93		111	204
Other (income) expense, net	(7)	0		(135)	0
Provision (benefit) for income taxes	(6)	4,434		52	4,938
CONSOLIDATED NET LOSS	(1,693)	(9,144)		(591)	(4,069)
Adjustments and reconciling items
COSTS AND EXPENSES:
CONSOLIDATED NET LOSS	0	0		0	0
Food and beverage sales
REVENUES:
Total revenues	36,148	39,123		76,394	83,566
COSTS AND EXPENSES:
Cost of goods and services sold	10,398	11,484		21,061	23,591
Food and beverage sales | Operating Segments | Reportable Segment
REVENUES:
Total revenues	36,148	39,123		76,394	83,566
COSTS AND EXPENSES:
Cost of goods and services sold	10,398	11,484		21,061	23,591
Other revenue
REVENUES:
Total revenues	436	602		939	1,148
Other revenue | Operating Segments | Reportable Segment
REVENUES:
Total revenues	436	602		939	1,148
Occupancy expenses
COSTS AND EXPENSES:
Cost of goods and services sold	6,170	5,536		11,849	11,684
Occupancy expenses | Operating Segments | Reportable Segment
COSTS AND EXPENSES:
Cost of goods and services sold	$ 6,170	$ 5,536		$ 11,849	$ 11,684