Note 3 - Derivative Obligations (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			6 Months Ended	9 Months Ended
	Feb. 29, 2016	Feb. 16, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Aug. 31, 2015
Series A Warrant [Member]
Class of Warrant or Right, Outstanding			404,412				404,412		404,412
Fair Value Assumptions, Expected Volatility Rate	91.00%
Fair Value Inputs, Discount Rate	1.20%
Fair Value Assumptions, Expected Term	5 years
Fair Value Assumptions, Expected Dividend Rate	0.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 8								$ 13.60
Series B Warrant [Member]
Class of Warrant or Right, Outstanding			222,427				222,427		222,427
Warrants Exercised		26,528		25,185
Shares Issued for Cashless Exercise of Warrants		125,000		106,711
Warrants Not Settleable in Cash, Fair Value Disclosure		$ 25		$ 33		$ 33
Fair Value Assumptions, Expected Volatility Rate						88.00%
Fair Value Inputs, Discount Rate						0.57%
Fair Value Assumptions, Expected Term						1 year 73 days
Fair Value Assumptions, Expected Dividend Rate						0.00%
Gain (Loss) on Cashless Exercise of Warrants			$ (475)				$ (1,039)
Class of Warrant or Right, Exercise Price of Warrants or Rights									$ 13.60
Derivative Liability			4,282				4,282
Derivative, Gain (Loss) on Derivative, Net			(454)				$ 3,152
Fair Value Assumptions, Expected Volatility Rate							79.00%
Fair Value Assumptions, Expected Term							5 years
Fair Value Assumptions, Expected Dividend Rate							0.00%
Gain (Loss) on Cashless Exercise of Warrants			$ (475)				$ (1,039)
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 8