Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 42,711	$ 40,749
Costs and expenses:
Cost of sales	13,467	13,452
Restaurant labor and related costs	13,745	13,204
Depreciation and amortization of restaurant property and equipment	1,452	1,466
Other operating expenses	8,224	8,407
Total restaurant operating expenses	36,888	36,529
General and administrative expenses	2,685	2,444
Operating income	3,138	1,776
Other income (expense):
Interest expense	(403)	(424)
Other, net	22	20
Total other expense	(381)	(404)
Income, before income taxes	2,757	1,372
Income tax provision	336	310
Net income	$ 2,421	$ 1,062
Basic earnings per share	$ 0.40	$ 0.18
Diluted earnings per share	$ 0.39	$ 0.18