Note 13 - Warrants (Details) - Common Stock Warrant Liability - USD ($)		12 Months Ended
	Jun. 03, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Stock Warrant Liability [Abstract]
Common Stock Warrant Liability		$ 275,008	$ 3,026	$ 4,283,932
Fair value of warrants classified as liability	$ 9,100,000		476,261	9,110,302
Fair value of warrants classified as equity		(336,254)		(5,300,572)
Gain (loss) from the adjustment for the change in fair value included in net income (loss)		61,246	(204,279)	(8,090,636)
Common Stock Warrant Liability		$ 0	$ 275,008	$ 3,026