Note 11 - Subsequent Events (Details Textual) - $ / shares				1 Months Ended
	Apr. 21, 2016	Apr. 06, 2016	Mar. 25, 2016	Apr. 21, 2016	Mar. 31, 2014	Mar. 31, 2016	Dec. 31, 2015	Nov. 30, 2014	Feb. 28, 2014	Jan. 31, 2014
Exchange from Series B Warrants to Warrant Shares [Member] | Exchange Offer [Member]
Common Stock, Par or Stated Value Per Share			$ 0.01
Series A Warrants [Member] | Exchange Offer [Member] | Subsequent Event [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1,770,556			1,770,556
Class of Warrant or Right Exercised During Period				1,040,373
Stock Issued During Period Shares Warrants Exercised				10,454,136
Series A Warrants [Member] | Exchange Offer [Member]
Stock to be Issued for Exchange Offer, Shares, Maximum			3,157,186
Cashless Exercise of Common Stock Warrants, Total			10.05
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			1
Series B Warrants [Member] | Exchange Offer [Member] | Subsequent Event [Member]
Cashless Exercise of Common Stock Warrants, Total		10.2
Cashless Exercised Class of Warrant Called by Each Warrant or Right		1
Stock Issued During Period, Shares, Conversion of Convertible Securities	18,059,671
Common Stock, Par or Stated Value Per Share						$ 0.01	$ 0.01	$ 0.01
Cashless Exercise of Common Stock Warrants, Total					3,333
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right						10.05
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									21,538	21,538