Note 10 - Activity of Business Segements - Consolidated Net Sales (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Building Supply [Member] | Operating Segments [Member]
Consolidated net sales	$ 7,022,000	$ 7,436,000	$ 21,700,000	$ 20,320,000
Disposable Protective Apparel [Member] | Operating Segments [Member]
Consolidated net sales	3,698,000	3,689,000	11,147,000	11,174,000
Infection Control [Member] | Operating Segments [Member]
Consolidated net sales	1,059,000	1,051,000	3,487,000	3,431,000
Consolidated net sales	$ 11,779,000	$ 12,176,000	$ 36,334,000	$ 34,925,000