Note 8 - Activity of Business Segments (Detail) - Reconciliation of total segment income to total consolidated net income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Income	$ 1,715,000	$ 1,775,000	$ 4,615,000	$ 4,443,000
Unallocated corporate overhead expenses	(1,077,000)	(1,147,000)	(3,272,000)	(3,508,000)
Provision for income taxes	(224,000)	(242,000)	(484,000)	(357,000)
Consolidated net income	414,000	386,000	859,000	578,000
Building Supply [Member]
Segment Income	849,000	953,000	2,275,000	2,334,000
Disposable Protective Apparel [Member]
Segment Income	550,000	516,000	1,472,000	1,113,000
Infection Control [Member]
Segment Income	$ 316,000	$ 306,000	$ 868,000	$ 996,000