Note 10 - Activity of Business Segments (Details) - Consolidated Net Sales (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Consolidated net sales	$ 9,956,000	$ 9,450,000
Operating Segments [Member] | Building Supply [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	5,521,000	5,164,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	3,364,000	3,220,000
Operating Segments [Member] | Infection Control [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	$ 1,071,000	$ 1,066,000