Note 9 - Stock Warrants (Detail) - Stock Warrants Activity (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Feb. 08, 2013	Dec. 08, 2010
Beginning balance	782,259	1,235,877	427,713
Beginning balance (in Dollars per Item)	0.85	0.35	0.55	1.21
Stock warrants granted	0	0
Stock warrants granted (in Dollars per share)	$ 0	$ 0
Stock warrants expired	0	0
Stock warrants expired (in Dollars per share)	$ 0	$ 0
Stock warrants exercised	(427,713)
Stock warrants exercised (in Dollars per share)	$ 0.55
Ending balance	354,546	1,235,877	427,713
Ending balance (in Dollars per Item)	1.21	0.35	0.55	1.21