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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Research and Development Expense | $ 14,000,000 | $ 14,300,000 | $ 14,500,000
Cash Equivalents, at Carrying Value | 0 | 0 |
Interest Paid, Net | 6,300,000 | 5,500,000 | 4,800,000
Income Taxes Paid | 19,100,000 | 12,800,000 | 7,200,000
Proceeds from Income Tax Refunds | 100,000 | 200,000 | 3,100,000
Interest Costs Capitalized | 600,000 | 500,000 | 300,000
Depreciation | 29,500,000 | 30,100,000 | 30,400,000
Finite-Lived Intangible Assets, Accumulated Amortization | 77,300,000 |  |
Goodwill, Impaired, Accumulated Impairment Loss | 212,600,000 |  |
Goodwill | 68,754,000 | 61,218,000 |
Other Intangible Assets, Net | 600,000 | 1,000,000 |
Amortization of Intangible Assets | 700,000 | 500,000 | 300,000
Goodwill, Impairment Loss | $ 0 | 0 | 0
Fair Value Estimates of Reporting Units, Threshold for No Goodwill Impairment, Percent of Decrease in Fair Value Estimates | 10.00% |  |
Workmanship Warranty Period | 1 year |  |
Standard Product Warranty Accrual | $ 4,100,000 | 5,500,000 |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | $ 31,600,000 | $ (19,000,000) | $ (32,600,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 0 | 0 | 0
Accrual for Environmental Loss Contingencies | $ 0 | $ 0 |
Short-term Investments | $ 0 | 0 |
Luxury Vinyl Tile Products [Member] |  |  |
Product Warranty Period | 15 years |  |
Restructuring Charges [Member] |  |  |
Impairment of Intangible Assets (Excluding Goodwill) |  | $ 3,400,000 |
Minimum [Member] | Carpet Products [Member] |  |  |
Product Warranty Period | 10 years |  |
Maximum [Member] | Carpet Products [Member] |  |  |
Product Warranty Period | 20 years |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 40 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 | 12 years |  |

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