Note 2 - Revenue Recognition (Details Textual)	9 Months Ended
	Sep. 30, 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	97.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 days
Percent of Revenue Due to Sales To Customers	97.00%
Installation of Carpet and Other Flooring Related Material [Member]
Percent of Revenue Due to Sales To Customers	3.00%