Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Public Offering [Member]
Stock Issued During Period, Shares, New Issues	6.7
Sale of Stock, Price Per Share	$ 4.30
Proceeds from Issuance of Common Stock	$ 26.8
Proceeds from Issuance of Common Stock			$ 26.8