Note 12 - Geographic Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
SOUTH AFRICA
Revenue, Net	$ 20,341	$ 17,695
% of consolidated net revenue	17.10%	14.50%
MEXICO
Revenue, Net	$ 17,616	$ 18,923
% of consolidated net revenue	14.80%	15.50%
CHINA
Revenue, Net	$ 14,755	$ 8,418
% of consolidated net revenue	12.40%	6.90%
CANADA
Revenue, Net	$ 6,374	$ 7,220
% of consolidated net revenue	5.30%	5.90%
INDIA
Revenue, Net	$ 6,372	$ 7,424
% of consolidated net revenue	5.30%	6.10%
JAPAN
Revenue, Net	$ 5,473	$ 7,420
% of consolidated net revenue	4.60%	6.10%
AUSTRALIA
Revenue, Net	$ 4,297	$ 6,437
% of consolidated net revenue	3.60%	5.30%
TURKEY
Revenue, Net	$ 439	$ 2,080
% of consolidated net revenue	0.40%	1.70%
International [Member]
Revenue, Net	$ 75,667	$ 75,617
% of consolidated net revenue	63.50%	62.00%
Revenue, Net	$ 119,279	$ 122,021