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Note 1 - The Company, Organization and Description of Business (Details)
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12 Months Ended |
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Dec. 28, 2014
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Dec. 30, 2012
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Dec. 29, 2013
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| Entity Operated Units [Member] | Denver, Colorado [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Franchise Restaurants Opened During Period |
1 |
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| Entity Operated Units [Member] | Gaithersburg, Maryland [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Franchise Restaurants Opened During Period |
1 |
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| Entity Operated Units [Member] | Marina del Rey, California [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Franchise Restaurants Opened During Period |
1 |
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| Entity Operated Units [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
65 |
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| Number of Franchise Restaurants Opened During Period |
3 |
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| Franchised Units [Member] | International [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
20 |
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| Number of Franchise Restaurants Opened During Period |
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4 |
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| Franchised Units [Member] | International [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
20 |
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| Franchised Units [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
77 |
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| Number of Franchise Restaurants Opened During Period |
3 |
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4 |
| Managed [Member] | Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
1 |
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| Company-owned Fish Market Restaurants [Member] | Mitchell's Fish Market [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
18 |
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| Company-owned Steakhouse Restaurants [Member] | Cameron's/Mitchell's Steakhouse [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
3 |
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| Ruth's Chris Steak House [Member] |
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| Note 1 - The Company, Organization and Description of Business (Details) [Line Items] |
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| Number of Restaurants |
143 |
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| Number of Franchise Restaurants Opened During Period |
6 |
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