Note 10 - Activity of Business Segments (Details) - Reconciliation of total segment income to total consolidated net income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	$ 1,900,000	$ 1,705,000	$ 3,210,000	$ 2,899,000
Unallocated corporate overhead expenses	(1,162,000)	(1,112,000)	(2,468,000)	(2,194,000)
Provision for income taxes	(264,000)	(219,000)	(252,000)	(261,000)
Consolidated net income	474,000	374,000	490,000	444,000
Building Supply [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	1,363,000	945,000	2,001,000	1,426,000
Disposable Protective Apparel [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	196,000	553,000	561,000	921,000
Infection Control [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Income	$ 341,000	$ 207,000	$ 648,000	$ 552,000