Note 14 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Consolidated assets	$ 3,315,000	$ 3,234,000
Operating Segments [Member]
Consolidated assets	2,308,000	2,447,000
Corporate, Non-Segment [Member]
Consolidated assets	1,007,000	787,000
Disposable Protective Apparel [Member] | Operating Segments [Member]
Consolidated assets	386,000	336,000
Building Supply [Member] | Operating Segments [Member]
Consolidated assets	1,908,000	2,098,000
Infection Control [Member] | Operating Segments [Member]
Consolidated assets	$ 14,000	$ 13,000