Note 6 - Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Amortization of Intangible Assets	$ 2.3	$ 1.1	$ 4.5	$ 2.0
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	4.6		4.6
Finite-Lived Intangible Assets, Amortization Expense, Year Two	9.0		9.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	8.4		8.4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	7.9		7.9
Finite-Lived Intangible Assets, Amortization Expense, Year Five	7.4		7.4
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 44.4		$ 44.4