Note 11 - Business Segment Information (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Sales	$ 1,854	$ 257
Denmark [Member]
Sales	1,291
United States [Member]
Sales	275	60
Belgium [Member]
Sales	132
Germany [Member]
Sales		63
Sweden [Member]
Sales	43	131
Other Foreign Countries [Member]
Sales	$ 113	$ 3