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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2017 | Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Inventory, Supplies, Net of Reserves |  | $ 3,100 | $ 2,700 |
Allowance for Doubtful Accounts Receivable, Current |  | 3,600 | 3,000 |
Amortization of Deferred Charges |  | 100 | 100 | $ 200
Asset Impairment Charges |  | $ 2,674 | 296 | 1,107
Franchise Extension Period |  | 25 years |  |
Revenue Recognition, Gift Cards, Breakage |  | $ 4,500 | 500 |
Deferred Revenue, Period Increase (Decrease) |  |  | 100 | 1,300
Net Income (Loss) Attributable to Parent |  | 1,377 | 27,345 | 14,362
Advertising Expense |  | 20,700 | 25,300 | 25,800
Foreign Currency Transaction Gain (Loss), before Tax |  | 300 | 2,300 | 1,600
Subsequent Event [Member] | Increase Deferred Tax Assets [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 1,000 |  |  |
Subsequent Event [Member] | Decrease Other Assets [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 2,300 |  |  |
Subsequent Event [Member] | Decrease Retained Earnings [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 1,300 |  |  |
Increase Deferred Tax Assets [Member] | Subsequent Event [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 1,600 |  |  |
Increase Additional Paid-in Capital [Member] | Subsequent Event [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 300 |  |  |
Increase Retained Earning [Member] | Subsequent Event [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 1,900 |  |  |
Decreases Taxes Payable [Member] | Subsequent Event [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 600 |  |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Deferred Compensation Plan Assets |  | 100 |  |
Accounts Payable and Accrued Liabilities [Member] |  |  |  |
Deferred Compensation Liability, Current and Noncurrent |  | 100 |  |
Other Noncurrent Liabilities [Member] |  |  |  |
Deferred Compensation Liability, Current and Noncurrent |  | 700 |  |
Other Assets [Member] |  |  |  |
Deferred Compensation Plan Assets |  | 700 | 600 |
Other Liabilities [Member] |  |  |  |
Deferred Compensation Liability, Current and Noncurrent |  |  | 600 |
Selling, General and Administrative Expenses [Member] |  |  |  |
Allocated Share-based Compensation Expense |  | $ 3,000 | 2,100 | 2,100
Elimination of Certain Discounts [Member] |  |  |  |
Deferred Revenue, Period Increase (Decrease) |  |  |  | 500
Net Income (Loss) Attributable to Parent |  |  |  | 400
Assessments of the Deferred Revenue Liability [Member] |  |  |  |
Net Income (Loss) Attributable to Parent |  |  | $ 100 | $ 1,200
Trademarks And Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 3 years |  |
Minimum [Member] | Trademarks And Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 1 year |  |
Maximum [Member] | Trademarks And Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 3 years |  |
Leasehold Improvements [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 10 years |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 3 years |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 7 years |  |
Software and Software Development Costs [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 3 years |  |
Software and Software Development Costs [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 5 years |  |

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