Note 2 - Revenue Recognition (Details Textual)	3 Months Ended
	Apr. 01, 2018
Percent of Revenue Due to Contracts With Customers	100.00%
Percent of Warranty Claims to Revenue	0.20%
Carpet, Modular Resilient Flooring, and Related Products [Member]
Percent of Revenue Due to Contracts With Customers	95.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 days
Percent of Revenue Due to Sales To Customers	98.00%
Installation of Carpet and Other Flooring Related Material [Member]
Percent of Revenue Due to Sales To Customers	2.00%