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Note 6 - Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Disclosure Text Block [Abstract]      
Amortization of Intangible Assets $ 2.8 $ 2.6 $ 2.6
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 3.1    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 3.1    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 2.9    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 2.7    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 2.3    
Finite-Lived Intangible Assets, Amortization Expense, after Year Five $ 8.2