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Note 4 - Property, Plant and Equipment (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Land and Building [Member]      
Assets Held-for-sale, Not Part of Disposal Group, Current   $ 1.9  
Depreciation $ 13.7 $ 13.4 $ 12.2