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Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 02, 2017 | Dec. 30, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Deferred Tax Assets, Gross |  |  | $ 29,548 | $ 48,079
Reclassification from Current Deferred Tax Assets to Noncurrent Deferred Tax Assets [Member] | Fiscal Year End January 1, 2017 [Member] |  |  |  |
Prior Period Reclassification Adjustment | $ 10,000 |  |  |
Reclassification from Current Deferred Tax Assets and Noncurrent Deferred Tax Liabilities to Noncurrent Deferred Tax Assets [Member] | Fiscal Year End January 1, 2017 [Member] |  |  |  |
Prior Period Reclassification Adjustment | 5,900 |  |  |
Rreclassification from Noncurrent Deferred Tax Liabilities to Noncurrent Deferred Tax Assets [Member] | Fiscal Year End January 1, 2017 [Member] |  |  |  |
Prior Period Reclassification Adjustment | 4,100 |  |  |
Accounting Standards Update 2016-09 [Member] |  |  |  |
Deferred Tax Assets, Gross |  |  | $ 9,400 |
Reclassification of Tax Withholdings from Cash from Operating Activities to Cash from Financing Activities [Member] | Fiscal 2016 [Member] |  |  |  |
Prior Period Reclassification Adjustment | 4,600 |  |  |
Reclassification of Tax Withholdings from Cash from Operating Activities to Cash from Financing Activities [Member] | Fiscal 2015 [Member] |  |  |  |
Prior Period Reclassification Adjustment | $ 1,000 |  |  |
Reclassification From Operating Expenses to Other Expense [Member] | Fiscal 2016 [Member] | Scenario, Forecast [Member] |  |  |  |
Prior Period Reclassification Adjustment |  | $ 2,200 |  |
Reclassification From Operating Expenses to Other Expense [Member] | Fiscal 2017 [Member] | Scenario, Forecast [Member] |  |  |  |
Prior Period Reclassification Adjustment |  | $ 1,900 |  |
Product Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Carpet, Hard Surface Flooring and Related Products [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 95.00% |
Product Concentration Risk [Member] | Revenue from Contract with Customer [Member] | Sale and Installation of Carpet and Related Products [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 5.00% |

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