Note 5 - Inventories (Detail) - Inventories (USD $)	Sep. 30, 2012	Dec. 31, 2011
Raw materials	$ 8,261,000	$ 8,007,000
Work in process	3,230,000	3,048,000
Finished goods	5,200,000	4,511,000
	$ 16,691,000	$ 15,566,000	[1]

[1] The condensed consolidated balance sheet as of December 31, 2011 has been prepared using information from the audited balance sheet as of that date.