CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Sep. 24, 2023	Sep. 29, 2024	Sep. 24, 2023
Revenue	$ 173,431	$ 153,428	$ 515,922	$ 431,015
Restaurant operating costs (exclusive of depreciation and amortization presented separately below):
Total restaurant operating costs	138,490	124,315	410,925	353,876
Operating expenses:
General and administrative	36,777	35,963	112,844	111,220
Depreciation and amortization	16,905	15,682	50,069	43,310
Pre-opening costs	1,759	2,522	4,295	8,190
Impairment and closure costs	114	132	388	479
Loss on disposal of property and equipment	63	489	178	547
Restructuring charges	498	812	1,497	6,448
Total operating expenses	56,116	55,600	169,271	170,194
Loss from operations	(21,175)	(26,487)	(64,274)	(93,055)
Interest income	(2,754)	(3,381)	(8,690)	(9,694)
Interest expense	26	19	242	58
Other expense	2,279	1,612	5,247	1,597
Net loss before income taxes	(20,726)	(24,737)	(61,073)	(85,016)
Income tax expense	90	318	300	954
Net loss	$ (20,816)	$ (25,055)	$ (61,343)	$ (85,970)
Earnings per share:
Net loss per share basic (in dollars per share)	$ (0.18)	$ (0.22)	$ (0.54)	$ (0.77)
Net loss per share diluted (in dollars per share)	$ (0.18)	$ (0.22)	$ (0.54)	$ (0.77)
Weighted average shares used in computing net loss per share basic (in shares)	114,752,307	112,179,722	113,743,453	111,687,538
Weighted average shares used in computing net loss per share diluted (in shares)	114,752,307	112,179,722	113,743,453	111,687,538
Food, beverage, and packaging
Restaurant operating costs (exclusive of depreciation and amortization presented separately below):
Total restaurant operating costs	$ 47,706	$ 41,754	$ 141,307	$ 118,333
Labor and related expenses
Restaurant operating costs (exclusive of depreciation and amortization presented separately below):
Total restaurant operating costs	47,520	43,750	142,954	126,506
Occupancy and related expenses
Restaurant operating costs (exclusive of depreciation and amortization presented separately below):
Total restaurant operating costs	15,054	13,961	44,523	40,117
Other restaurant operating costs
Restaurant operating costs (exclusive of depreciation and amortization presented separately below):
Total restaurant operating costs	$ 28,210	$ 24,850	$ 82,141	$ 68,920