Note 6 - Inventories (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cost of Sales [Member]
Inventory, LIFO Reserve, Effect on Income, Net	$ 0.8	$ 0.7
LIFO Inventory Amount	10.5	14.6
Inventory Difference Using FIFO Basis	$ 28.8	$ 28.0