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Note 7 - Segment Information (Details Textual)	6 Months Ended
Note 7 - Segment Information (Details Textual)	Jun. 28, 2015	Jun. 29, 2014
Entity Operated Units [Member] \| Ruths Chris Steak House [Member]
Number of Restaurants	66
Management Agreement Operating Unit [Member] \| Ruths Chris Steak House [Member]
Number of Restaurants	1
Franchised Units [Member] \| Ruths Chris Steak House [Member]
Number of Restaurants	79
Ruths Chris Steak House [Member]
Number of Restaurants	146
Number of Operating Segments		3
Number of Reportable Segments	2