Condensed Consolidated Statements of Income and Comprehensive Income - Unaudited (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 11, 2013	Jun. 12, 2012	Jun. 11, 2013	Jun. 12, 2012
Income Statement [Abstract]
Revenues	$ 60,359	$ 50,736	$ 120,162	$ 103,678
Costs and expenses:
Costs of sales	18,113	15,596	36,533	31,963
Restaurant operating expenses	26,909	21,462	53,454	43,778
Marketing and advertising costs	1,347	1,153	2,256	2,006
Pre-opening costs	328	832	919	902
General and administrative costs	4,163	2,754	7,938	5,400
Management and accounting fees paid to related party		452		1,196
Secondary public offering costs			412
Public offering transaction bonuses			1,805
Depreciation and amortization	2,564	1,876	5,006	3,570
Operating income	6,935	6,611	11,839	14,863
Other income (expense), net:
Interest expense	(24)	(1,008)	(48)	(2,228)
Other		68		65
Income from continuing operations before income taxes	6,911	5,671	11,791	12,700
Income tax expense	2,480	2,043	3,791	4,172
Income from continuing operations	4,431	3,628	8,000	8,528
Discontinued operations, net of income tax benefit		(2)		84
Net income	4,431	3,626	8,000	8,612
Basic income per common share:
Continuing operations	$ 0.19	$ 0.20	$ 0.34	$ 0.47
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Basic income per share	$ 0.19	$ 0.20	$ 0.34	$ 0.48
Diluted income per common share:
Continuing operations	$ 0.19	$ 0.20	$ 0.34	$ 0.47
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Diluted income per share	$ 0.19	$ 0.20	$ 0.34	$ 0.48
Shares used in computing net income per common share:
Basic	23,794,667	17,994,667	23,794,667	17,994,667
Diluted	23,826,622	17,994,667	23,794,869	17,994,667
Comprehensive income	$ 4,431	$ 3,626	$ 8,000	$ 8,612