Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) $ in Thousands	Mar. 04, 2016 shares	Dec. 31, 2016 USD ($) shares	Jun. 30, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)
Common Stock, Shares Authorized | shares	350,000,000	150,000,000	150,000,000
Cash and Cash Equivalents, at Carrying Value		$ 4,899	$ 5,835	$ 2,942	$ 3,357
Working Capital		5,499
Retained Earnings (Accumulated Deficit)		$ (182,106)	$ (156,262)
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	20