Note 5 - Inventories (Detail) - Inventories (USD $)	Jun. 30, 2012	Dec. 31, 2011
Raw materials	$ 7,073,000	$ 8,007,000
Work in process	2,868,000	3,048,000
Finished goods	4,284,000	4,511,000
	$ 14,225,000	$ 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.