Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)		1 Months Ended	9 Months Ended
	Mar. 04, 2016 shares	Feb. 29, 2016 USD ($)	Mar. 31, 2016 USD ($) shares	Mar. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($)
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	20
Common Stock, Shares Authorized | shares	350,000,000		350,000,000		350,000,000
Cash and Cash Equivalents, at Carrying Value			$ 7,247,000	$ 4,792,000	$ 3,357,000	$ 14,811,000
Working Capital			9,163,000
Retained Earnings (Accumulated Deficit)			(152,568,000)		(137,674,000)
Gross Proceeds from Financing Transaction		$ 15,000,000
Repayments of Convertible Debt		7,500,000	$ 6,444,000
Net Proceeds from Financing Transaction		7,300,000
Maximum Period Of Agreement			21 years
Number of Reportable Segments			1
Debt Issuance Costs, Net		$ 220,000	$ 176,000		$ 0