Note 9 - Recently Issued Accounting Pronouncements (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 02, 2017	Jul. 02, 2017
Reclassification from Current Deferred Tax Assets to Noncurrent Deferred Tax Assets [Member] | Fiscal Year End January 1, 2017 [Member]
Prior Period Reclassification Adjustment	$ 10.0
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	5.9
Rreclassification from Noncurrent Deferred Tax Liabilities to Noncurrent Deferred Tax Assets [Member] | Fiscal Year End January 1, 2017 [Member]
Prior Period Reclassification Adjustment	4.1
Accounting Standards Update 2016-09 [Member]
Deferred Tax Assets, Gross	5.8
Cumulative Effect of New Accounting Principle in Period of Adoption	5.8
Reclassification of Tax Withholdings from Cash from Operating Activities to Cash from Financing Activities [Member] | April 3, 2016 [Member]
Prior Period Reclassification Adjustment	$ 4.6
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Carpet, Hard Surface Flooring and Related Products [Member]
Concentration Risk, Percentage		95.00%