Note 8 - Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Amortization of Intangible Assets, Total	$ 2.9	$ 1.7
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	8.7
Finite-Lived Intangible Assets, Amortization Expense, Year Two	11.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	10.4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9.6
Finite-Lived Intangible Assets, Amortization Expense, Year Five	8.7
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 46.6