Consolidated Statements Of Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Revenues:
Revenue	$ 443,961,000	$ 421,703,000	$ 1,285,382,000	$ 1,236,237,000
Costs and expenses:
Food, beverage and packaging costs	138,012,000	131,103,000	401,244,000	371,317,000
Restaurant wages and related expenses	148,838,000	141,303,000	439,773,000	408,541,000
Restaurant rent expense (Note 7)	31,244,000	30,551,000	93,487,000	91,456,000
Other restaurant operating expenses	70,237,000	66,733,000	204,676,000	193,280,000
Advertising expense	17,841,000	16,619,000	51,446,000	48,927,000
General and administrative expenses	22,572,000	19,209,000	65,416,000	61,276,000
Depreciation and amortization	19,284,000	20,101,000	58,897,000	61,131,000
Impairment and other lease charges	1,196,000	784,000	19,868,000	1,281,000
Other income, net (Note 15)	(1,750,000)	(1,053,000)	(1,109,000)	(111,000)
Total operating expenses	447,474,000	425,350,000	1,333,698,000	1,237,098,000
Loss from operations	(3,513,000)	(3,647,000)	(48,316,000)	(861,000)
Gain (Loss) on Extinguishment of Debt	0	0	0	8,538,000
Interest expense	7,896,000	7,724,000	22,968,000	21,392,000
Loss before income taxes	(11,409,000)	(11,371,000)	(71,284,000)	(30,791,000)
Provision (benefit) for income taxes	(2,712,000)	(1,469,000)	(14,842,000)	(4,162,000)
Net loss	$ (8,697,000)	$ (9,902,000)	$ (56,442,000)	$ (26,629,000)
Basic net income (loss) per share (in dollars per share)	$ (0.17)	$ (0.20)	$ (1.11)	$ (0.53)
Diluted net income (loss) per share (in shares)	$ (0.17)	$ (0.20)	$ (1.11)	$ (0.53)
Weighted average common shares outstanding:
Weighted average common shares outstanding (in shares)	50,805,461	49,927,583	50,689,730	49,889,673
Shares used in computing diluted net income (loss) per share (in shares)	50,805,461	49,927,583	50,689,730	49,889,673
Other comprehensive income (loss), net of tax:
Net loss	$ (8,697,000)	$ (9,902,000)	$ (56,442,000)	$ (26,629,000)
Change in valuation of interest rate swap (Note 8)	2,905,000	269,000	7,782,000	2,924,000
Comprehensive loss	$ (5,792,000)	$ (9,633,000)	$ (48,660,000)	$ (23,705,000)