Note 14 - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating Segments [Member] | Building Supply [Member]
Consolidated net income	$ 3,605,000	$ 4,750,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Consolidated net income	1,439,000	1,601,000
Operating Segments [Member] | Infection Control [Member]
Consolidated net income	1,396,000	1,953,000
Operating Segments [Member]
Consolidated net income	6,440,000	8,304,000
Corporate, Non-Segment [Member]
Consolidated net income	$ 4,919,000	4,770,000
Common Stock [Member]
Gain on sale of marketable securities and investment in common stock warrants		409,000
Consolidated net income	$ 1,041,000	2,742,000
Provision for income taxes	$ 480,000	$ 1,201,000