Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 40,186	$ 38,564	$ 82,897	$ 79,313
Costs and expenses:
Cost of sales	12,687	12,801	26,154	26,253
Restaurant labor and related costs	13,529	13,007	27,274	26,211
Depreciation and amortization of restaurant property and equipment	1,456	1,477	2,908	2,943
Other operating expenses	8,279	8,430	16,503	16,837
Total restaurant operating expenses	35,951	35,715	72,839	72,244
General and administrative expenses	3,621	2,391	6,306	4,835
Operating income	614	458	3,752	2,234
Other income (expense):
Interest expense	(393)	(419)	(796)	(843)
Other, net	92	8	114	28
Total other expense	(301)	(411)	(682)	(815)
Income, before income taxes	313	47	3,070	1,419
Income tax (provision) benefit	(92)	10	(428)	(300)
Net income	$ 221	$ 57	$ 2,642	$ 1,119
Basic earnings per share	$ 0.04	$ 0.01	$ 0.44	$ 0.19
Diluted earnings per share	$ 0.04	$ 0.01	$ 0.42	$ 0.18