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Note 1 - Principles of Consolidation and Basis of Presentation (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 98 Months Ended
Sep. 30, 2016
Jun. 30, 2015
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2014
Jun. 30, 2013
Jun. 27, 2012
IBio Inc [Member]                
Equity Method Investment, Ownership Percentage 6.00%   6.00%          
Investment Owned, Balance, Shares 1,266,706   1,266,706          
Asset Impairment Charges     $ 2.2          
Investment Owned, at Fair Value $ 0.7   $ 0.7          
Consecutive Trading Days for Stock Price Threshold 15 days              
Investment, Shares Sold   73,191            
IBio Inc [Member] | Maximum [Member]                
Share Price $ 0.88 $ 0.88 $ 0.88   $ 0.88 $ 0.88 $ 0.88  
Share Price $ 0.15   $ 0.15 $ 0.11       $ 0.09