Note 9 - Stock Warrants (Details) (USD $)	Jun. 30, 2013	Mar. 31, 2013	Feb. 08, 2013	Jun. 30, 2012	Mar. 31, 2012	Dec. 08, 2010	Dec. 12, 2005	Feb. 08, 2013 Warrants Issued in Connection with Private Placement Offering [Member]	Mar. 31, 2003 Warrants Issued in Connection with Private Placement Offering [Member]	Dec. 08, 2010 First Placement Agent [Member]	Dec. 08, 2010 Second Placement Agent [Member]
Note 9 - Stock Warrants (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	354,546	782,259	427,713	1,235,877	1,235,877				387,201	338,182	16,364
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	1.21	0.85	0.55	0.35	0.35	1.21			0.01
Number of Years							10 years	10 years
Warrants Issued, Fair Value Disclosure (in Dollars)			$ 209,000