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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Jan. 01, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Inventory, Supplies, Net of Reserves |  |  |  | $ 2,700,000 | $ 3,100,000 |
Inventory Valuation Reserves |  |  |  | 1,000,000 | 1,000,000 |
Allowance for Doubtful Accounts Receivable, Current |  |  |  | 3,100,000 | 3,600,000 |
Amortization of Deferred Charges |  |  |  | 100,000 | 100,000 | $ 100,000
Asset Impairment Charges |  |  |  | $ 104,000 | 2,674,000 | 296,000
Franchise Extension Period |  |  |  | 25 years |  |
Unredeemed Gift Cards, Breakage |  |  |  | $ 8,300,000 | 4,500,000 | 500,000
Deferred Revenue, Period Increase (Decrease) |  |  |  | 100,000 | 0 | 100,000
Advertising Expense |  |  |  | 19,000,000 | 20,700,000 | 25,300,000
Foreign Currency Transaction Gain (Loss), before Tax |  |  |  | 1,600,000 | (300,000) | (2,300,000)
Revenues |  |  |  | 357,866,000 | 364,204,000 | 377,694,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  |  | 13,813,000 | 5,309,000 | 17,898,000
Increase Deferred Tax Assets [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | $ 1,000,000 |  |  |  |
Decrease Other Assets [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 2,300,000 |  |  |  |
Decrease Retained Earnings [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 1,300,000 |  |  |  |
Increase Deferred Tax Assets [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 1,600,000 |  |  |  |
Increase Additional Paid-in Capital [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 300,000 |  |  |  |
Increase Retained Earning [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 1,900,000 |  |  |  |
Decreases Taxes Payable [Member] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | $ 600,000 |  |  |  |
Accounting Standards Update 2014-09 [Member] | Scenario, Forecast [Member] |  |  |  |  |  |
Revenues |  |  | $ (3,900,000) |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  | $ (3.90) |  |  |
Accounting Standards Update 2014-09 [Member] | Subsequent Event [Member] |  |  |  |  |  |
Cumulative Effect on Retained Earnings, before Tax | $ 12,300,000 |  |  |  |  |
Cumulative Effect on Retained Earnings, Tax | $ 3,000,000 |  |  |  |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |  |  |
Deferred Compensation Plan Assets |  |  |  | 100,000 | 100,000 |
Other Noncurrent Liabilities [Member] |  |  |  |  |  |
Deferred Compensation Liability, Current and Noncurrent |  |  |  | 1,000,000 | 700,000 |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  | 3,400,000 | 3,000,000 | $ 2,100,000
Loyalty Program [Member] |  |  |  |  |  |
Deferred Revenue |  |  |  | $ 1,400,000 | $ 1,800,000 |
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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