Note 8 - Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Amortization of Intangible Assets, Total	$ 1.9	$ 1.9
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	7.6
Finite-Lived Intangible Assets, Amortization Expense, Year Two	9.6
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9.3
Finite-Lived Intangible Assets, Amortization Expense, Year Four	8.9
Finite-Lived Intangible Assets, Amortization Expense, Year Five	8.3
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 45.7