Note 10 - Franchise Operations (Details)
12 Months Ended 13 Months Ended 12 Months Ended
Dec. 30, 2012
Jul. 31, 2014
Dec. 28, 2014
Dec. 29, 2013
Jun. 30, 2014
Franchised Units [Member] | International [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     20    
Number of Franchise Restaurants Opened During Period 4        
Franchised Units [Member] | International [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     20    
Franchised Units [Member] | Boise, Idaho [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     1    
Franchised Units [Member] | Panama City, Panama [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     1    
Franchised Units [Member] | Taipei, Taiwan [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     1    
Franchised Units [Member] | Dubai [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants         2
Number of Restaurants Closed During Period   1      
Franchised Units [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Restaurants     77    
Number of Stores     3    
Number of Franchise Restaurants Opened During Period     3 4  
Number of Restaurants Acquired During Period 0     0  
Number of Restaurants Sold During Period 0     0  
Franchise Operations [Member] | International [Member] | Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Number of Franchise Restaurants to be Developed     4    
Ruth's Chris Steak House [Member]          
Note 10 - Franchise Operations (Details) [Line Items]          
Royalty of Sales Percentage     5.00%    
Advertising Fee Percentage     1.00%    
Number of Restaurants     143    
Number of Franchise Restaurants Opened During Period     6