Note 10 - Activity of Business Segments (Detail) - Reconciliation of total segment income to total consolidated net income (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Income	$ 1,308,000	$ 1,194,000
Unallocated corporate overhead expenses	(1,304,000)	(1,082,000)
(Provision) benefit for income taxes	11,000	(42,000)
Consolidated net income	15,000	70,000
Building Supply [Member]
Segment Income	637,000	481,000
Disposable Protective Apparel [Member]
Segment Income	364,000	368,000
Infection Control [Member]
Segment Income	$ 307,000	$ 345,000