Note 7 - Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Amortization of Intangible Assets	$ 1.0	$ 0.7	$ 2.6	$ 2.1
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	1.1		1.1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3.6		3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3.4		3.4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3.1		3.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2.6		2.6
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 8.9		$ 8.9