Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 12, 2017	Sep. 06, 2016	Sep. 12, 2017	Sep. 06, 2016
Revenue:
Company restaurant sales	$ 106,298	$ 100,173	$ 311,542	$ 289,640
Franchise revenue	3,978	3,686	11,494	10,591
Franchise sublease income	712	560	1,878	1,617
Total revenue	110,988	104,419	324,914	301,848
Restaurant operating expenses:
Food and paper costs	29,648	27,574	86,336	80,061
Labor and related expenses	33,635	30,748	100,041	90,781
Occupancy and other operating expenses	22,608	20,911	64,243	60,560
General and administrative	8,817	8,566	27,177	25,072
Depreciation and amortization	5,522	5,157	15,903	16,175
Occupancy and other - franchise subleases	654	521	1,738	1,534
Pre-opening costs	354	94	531	222
Restaurant closure charges, net	(16)	(133)	(1)	(121)
Loss on disposal of assets, net	233	54	524	191
Total operating expenses	101,455	93,492	296,492	274,475
Income from operations	9,533	10,927	28,422	27,373
Other expense
Interest expense	1,628	1,412	4,798	4,289
Transaction-related costs	0	490	0	681
Total other expense	1,628	1,902	4,798	4,970
Income from operations before provision for income taxes	7,905	9,025	23,624	22,403
Provision for income taxes	2,804	4,076	8,955	9,529
Net income	5,101	4,949	14,669	12,874
Other comprehensive loss:
Change in fair value of interest rate cap, net of tax	(35)	(122)	(271)	(122)
Total other comprehensive loss	(35)	(122)	(271)	(122)
Comprehensive income	$ 5,066	$ 4,827	$ 14,398	$ 12,752
Earnings per share:
Basic (in dollars per share)	$ 0.13	$ 0.13	$ 0.38	$ 0.33
Diluted (in dollars per share)	$ 0.13	$ 0.13	$ 0.37	$ 0.33
Weighted-average shares outstanding
Basic (in shares)	38,695,099	38,465,064	38,744,963	38,518,431
Diluted (in shares)	39,839,571	38,688,961	40,016,062	38,682,273