Note 10 - Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
SOUTH AFRICA
Revenue, Net	$ 4,968	$ 4,388	$ 15,189	$ 12,358
% of consolidated net revenue	17.60%	14.20%	17.50%	13.70%
MEXICO
Revenue, Net	$ 3,962	$ 4,983	$ 12,076	$ 14,181
% of consolidated net revenue	14.00%	16.10%	13.90%	15.80%
CHINA
Revenue, Net	$ 3,682	$ 3,046	$ 10,197	$ 5,791
% of consolidated net revenue	13.00%	9.80%	11.70%	6.40%
INDIA
Revenue, Net	$ 1,385	$ 1,850	$ 5,001	$ 5,112
% of consolidated net revenue	4.90%	6.00%	5.70%	5.70%
CANADA
Revenue, Net	$ 1,368	$ 1,643	$ 4,173	$ 4,858
% of consolidated net revenue	4.80%	5.30%	4.80%	5.40%
JAPAN
Revenue, Net	$ 1,306	$ 1,338	$ 3,907	$ 6,090
% of consolidated net revenue	4.60%	4.30%	4.50%	6.80%
AUSTRALIA
Revenue, Net	$ 829	$ 1,366	$ 3,316	$ 4,441
% of consolidated net revenue	2.90%	4.40%	3.80%	4.90%
TURKEY
Revenue, Net	$ 63	$ 729	$ 360	$ 1,873
% of consolidated net revenue	0.20%	2.40%	0.40%	2.10%
International [Member]
Revenue, Net	$ 17,563	$ 19,343	$ 54,219	$ 54,704
% of consolidated net revenue	62.00%	62.50%	62.30%	60.80%
Revenue, Net	$ 28,269	$ 31,009	$ 87,002	$ 89,969