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Note 5 - Inventories (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Selling Expense $ 9.9 $ 4.6 $ 14.5 $ 15.2