Note 4 - Inventories (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
LIFO Inventory Amount	$ 9.7		$ 10.5
Inventory Difference Using FIFO Basis	28.3		$ 28.8
Cost of Sales [Member]
Inventory, LIFO Reserve, Effect on Income, Net	$ 0.5	$ 0.4