Note 10 - Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
MEXICO
Revenue, Net	$ 4,999	$ 4,181
% of consolidated net revenue	18.80%	14.30%
SOUTH AFRICA
Revenue, Net	$ 4,214	$ 4,891
% of consolidated net revenue	15.80%	16.70%
CHINA
Revenue, Net	$ 2,735	$ 3,028
% of consolidated net revenue	10.30%	10.30%
JAPAN
Revenue, Net	$ 1,593	$ 1,201
% of consolidated net revenue	6.00%	4.10%
INDIA
Revenue, Net	$ 1,304	$ 1,911
% of consolidated net revenue	4.90%	6.50%
CANADA
Revenue, Net	$ 1,258	$ 1,556
% of consolidated net revenue	4.70%	5.30%
AUSTRALIA
Revenue, Net	$ 659	$ 1,345
% of consolidated net revenue	2.50%	4.60%
TURKEY
Revenue, Net	$ 97	$ 181
% of consolidated net revenue	0.40%	0.60%
International [Member]
Revenue, Net	$ 16,859	$ 18,294
% of consolidated net revenue	63.40%	62.40%
Revenue, Net	$ 26,611	$ 29,266