Note 8 - Activity of Business Segments (Detail) - Reconciliation of total segment income to total consolidated net income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Income	$ 1,705,000	$ 1,725,000	$ 2,899,000	$ 2,671,000
Unallocated corporate overhead expenses	(1,112,000)	(1,240,000)	(2,194,000)	(2,364,000)
Provision for income taxes	(219,000)	(181,000)	(261,000)	(115,000)
Consolidated net income	374,000	304,000	444,000	192,000
Building Supply [Member]
Segment Income	945,000	1,095,000	1,426,000	1,382,000
Disposable Protective Apparel [Member]
Segment Income	553,000	302,000	921,000	598,000
Infection Control [Member]
Segment Income	$ 207,000	$ 328,000	$ 552,000	$ 691,000