Note 10 - Segment Information - Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue, Net	$ 39,886	$ 26,611	[1]
BRAZIL
Revenue, Net	$ 9,943
% of consolidated net revenue	24.90%
SOUTH AFRICA
Revenue, Net	$ 6,027	$ 4,214
% of consolidated net revenue	15.10%	15.80%
MEXICO
Revenue, Net	$ 4,688	$ 4,999
% of consolidated net revenue	11.80%	18.80%
CHINA
Revenue, Net	$ 2,408	$ 2,735
% of consolidated net revenue	6.00%	10.30%
JAPAN
Revenue, Net	$ 1,709	$ 1,593
% of consolidated net revenue	4.30%	6.00%
INDIA
Revenue, Net	$ 1,612	$ 1,304
% of consolidated net revenue	4.00%	4.90%
CANADA
Revenue, Net	$ 1,303	$ 1,258
% of consolidated net revenue	3.30%	4.70%
AUSTRALIA
Revenue, Net	$ 810	$ 659
% of consolidated net revenue	2.00%	2.50%
TURKEY
Revenue, Net	$ 65	$ 97
% of consolidated net revenue	0.20%	0.40%
International [Member]
Revenue, Net	$ 28,565	$ 16,859
% of consolidated net revenue	71.60%	63.40%

[1] See Note 2 Correction of Prior Period Financial Statements.