Note 12 - Geographic Data (Details) - International net revenue detail (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	$ 27,753	$ 25,357	$ 80,152	$ 68,984
Mexico [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	4,002	4,095	11,277	10,432
% of consolidated net revenue	14.40%	16.10%	14.10%	15.10%
South Africa [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	3,873	1,823	11,809	5,590
% of consolidated net revenue	14.00%	7.20%	14.70%	8.10%
Japan [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	2,079	1,733	4,680	4,602
% of consolidated net revenue	7.50%	6.80%	5.80%	6.70%
China [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	1,911	1,458	4,956	2,999
% of consolidated net revenue	6.90%	5.70%	6.20%	4.30%
Canada [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	1,545	1,660	4,389	4,864
% of consolidated net revenue	5.60%	6.50%	5.50%	7.10%
Australia [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	1,283	2,208	5,046	5,056
% of consolidated net revenue	4.60%	8.70%	6.30%	7.30%
India [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	1,203	467	3,318	1,404
% of consolidated net revenue	4.30%	1.80%	4.10%	2.00%
All Others [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	530	897	2,287	2,855
% of consolidated net revenue	1.90%	3.50%	2.90%	4.10%
International [Member]
Note 12 - Geographic Data (Details) - International net revenue detail [Line Items]
Net revenue (in Dollars)	$ 16,426	$ 14,341	$ 47,762	$ 37,802
% of consolidated net revenue	59.20%	56.30%	59.60%	54.70%