Note 10 - Warrants (Details Textual) - $ / shares	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Mar. 31, 2014
Warrants Issued to Individuals who Provided Guarantees in Connection with Lines of Credit [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			2,060,000	2,060,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			2,060,000	2,060,000
Warrants Expiring February 1, 2017 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	22,222
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	22,222
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1.50
Warrants Issued in 2015 Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		11,085,174
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		11,085,174
Weighted Average [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.85
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	13,167,396		1,782,222
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	13,167,396		1,782,222