Note 10 - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Segments [Member] | Building Supply [Member]
Consolidated net income	$ 1,012,000	$ 653,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Consolidated net income	335,000	331,000
Operating Segments [Member] | Infection Control [Member]
Consolidated net income	455,000	387,000
Operating Segments [Member]
Consolidated net income	1,802,000	1,371,000
Corporate, Non-Segment [Member]
Consolidated net income	1,069,000	1,195,000
Consolidated net income	507,000	148,000
Provision for income taxes	$ 226,000	$ 28,000