Note 12 - Segment and Geographic Information (Details) - Product Revenue by Geographic Location (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Note 12 - Segment and Geographic Information (Details) - Product Revenue by Geographic Location [Line Items]
Total revenue	$ 34,010,287	$ 15,247,011
Percentage of total revenue	100.00%	100.00%
United States [Member]
Note 12 - Segment and Geographic Information (Details) - Product Revenue by Geographic Location [Line Items]
Total revenue	31,533,817	12,280,079
Percentage of total revenue	93.00%	80.00%
Europe [Member]
Note 12 - Segment and Geographic Information (Details) - Product Revenue by Geographic Location [Line Items]
Total revenue	1,695,816	1,583,993
Percentage of total revenue	5.00%	11.00%
Other location [Member]
Note 12 - Segment and Geographic Information (Details) - Product Revenue by Geographic Location [Line Items]
Total revenue	$ 780,654	$ 1,382,939
Percentage of total revenue	2.00%	9.00%