Note 11 - Warrants (Detail) - Common Stock Warrant Liability (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Beginning balance as of January 1, 2013	$ 4,283,932
Gain from the adjustment for the change in fair value included in net income	(4,280,297)	(77,600)
Ending balance as of March 31, 2013	$ 3,635