Note 17 - Business Segment Information (Detail) - Revenues by Geographic Area (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Sales	$ 1,547,000	$ 5,226,000
United States [Member]
Sales	841,000	3,111,000
Belgiem [Member]
Sales	200,000
Germany [Member]
Sales	141,000
Sweden [Member]
Sales	124,000
Switzerland [Member]
Sales	111,000
Other Foreign Countries [Member]
Sales	130,000	321,000
China [Member]
Sales		$ 1,794,000