Note 12 - Geographic Data (Detail) - International net revenue detail (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net revenue (in Dollars)	$ 26,177	$ 21,047
South Africa [Member]
Net revenue (in Dollars)	3,986	1,915
% of consolidated net revenue	15.20%	9.10%
Mexico [Member]
Net revenue (in Dollars)	3,525	3,243
% of consolidated net revenue	13.50%	15.40%
Australia [Member]
Net revenue (in Dollars)	1,924	1,464
% of consolidated net revenue	7.30%	7.00%
China [Member]
Net revenue (in Dollars)	1,670	865
% of consolidated net revenue	6.40%	4.10%
Canada [Member]
Net revenue (in Dollars)	1,324	1,438
% of consolidated net revenue	5.10%	6.80%
Japan [Member]
Net revenue (in Dollars)	1,298	1,272
% of consolidated net revenue	5.00%	6.00%
Romania [Member]
Net revenue (in Dollars)	1,187
% of consolidated net revenue	4.50%
All Others [Member]
Net revenue (in Dollars)	1,574	1,565
% of consolidated net revenue	6.00%	7.50%
International [Member]
Net revenue (in Dollars)	$ 16,488	$ 11,762
% of consolidated net revenue	63.00%	55.90%