Note 10 - Consolidated Net Sales (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Building Supply [Member] | Operating Segments [Member]
Consolidated net sales	$ 7,924,000	$ 7,073,000	$ 14,679,000	$ 12,884,000
Disposable Protective Apparel [Member] | Operating Segments [Member]
Consolidated net sales	3,624,000	3,837,000	7,448,000	7,485,000
Infection Control [Member] | Operating Segments [Member]
Consolidated net sales	1,160,000	1,185,000	2,428,000	2,380,000
Consolidated net sales	$ 12,708,000	$ 12,095,000	$ 24,555,000	$ 22,749,000