Note 4 - Inventories (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Cost of Sales [Member]
Inventory, LIFO Reserve, Effect on Income, Net	$ 0.3	$ 0.2
LIFO Inventory Amount	10.7		$ 14.6
Inventory Difference Using FIFO Basis	$ 28.3		$ 28.0