Note 10 - Activity of Business Segements - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Operating Segments [Member] | Building Supply [Member]
Consolidated assets	$ 2,255,000	$ 2,410,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Consolidated assets	356,000	394,000
Operating Segments [Member] | Infection Control [Member]
Consolidated assets	148,000	166,000
Operating Segments [Member]
Consolidated assets	2,759,000	2,970,000
Corporate, Non-Segment [Member]
Consolidated assets	39,000	43,000
Consolidated assets	$ 2,798,000	$ 3,013,000