Note 13 - Segment Information (Details) - Geographic Data (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	$ 111,959	$ 98,551
MEXICO
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	16,127	14,602
% of consolidated net revenue	14.40%	14.80%
SOUTH AFRICA
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	16,099	9,893
% of consolidated net revenue	14.40%	10.00%
AUSTRALIA
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	6,995	7,205
% of consolidated net revenue	6.20%	7.30%
JAPAN
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	6,831	6,267
% of consolidated net revenue	6.10%	6.40%
CANADA
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	6,567	6,949
% of consolidated net revenue	5.90%	7.10%
CHINA
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	6,334	4,210
% of consolidated net revenue	5.70%	4.30%
INDIA
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	5,387	1,947
% of consolidated net revenue	4.80%	2.00%
All Others [Member]
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	3,042	4,381
% of consolidated net revenue	2.70%	4.40%
International [Member]
Note 13 - Segment Information (Details) - Geographic Data [Line Items]
Revenues	$ 67,382	$ 55,454
% of consolidated net revenue	60.20%	56.30%