Note 10 - Consolidated Net Sales (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Building Supply [Member] | Operating Segments [Member]
Consolidated net sales	$ 6,754,000	$ 5,811,000
Disposable Protective Apparel [Member] | Operating Segments [Member]
Consolidated net sales	3,825,000	3,648,000
Infection Control [Member] | Operating Segments [Member]
Consolidated net sales	1,268,000	1,195,000
Consolidated net sales	$ 11,847,000	$ 10,654,000