Note 10 - Activity of Business Segments (Detail) - Consolidated net property and equipment, goodwill and intangible assets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Segment Assets	$ 3,443,000	$ 3,543,000
Unallocated corporate assets	34,000	44,000
Total consolidated assets	3,477,000	3,587,000
Building Supply [Member]
Segment Assets	2,211,000	2,252,000
Disposable Protective Apparel [Member]
Segment Assets	509,000	528,000
Infection Control [Member]
Segment Assets	$ 723,000	$ 763,000