Note 14 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Consolidated assets	$ 3,234,000	$ 2,735,000
Operating Segments [Member]
Consolidated assets	2,447,000	2,694,000
Corporate, Non-Segment [Member]
Consolidated assets	787,000	41,000
Disposable Protective Apparel [Member] | Operating Segments [Member]
Consolidated assets	336,000	346,000
Building Supply [Member] | Operating Segments [Member]
Consolidated assets	2,098,000	2,208,000
Infection Control [Member] | Operating Segments [Member]
Consolidated assets	$ 13,000	$ 140,000