Note 10 - Activity of Business Segments (Details) - Reconciliation of total segment income to total consolidated net income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	$ 2,460,000	$ 1,715,000	$ 5,670,000	$ 4,615,000
Unallocated corporate overhead expenses	(1,147,000)	(1,077,000)	(3,615,000)	(3,272,000)
Provision for income taxes	(408,000)	(224,000)	(660,000)	(484,000)
Consolidated net income	905,000	414,000	1,395,000	859,000
Building Supply [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	1,668,000	849,000	3,668,000	2,275,000
Disposable Protective Apparel [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	389,000	550,000	950,000	1,472,000
Infection Control [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	$ 403,000	$ 316,000	$ 1,052,000	$ 868,000