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Note 16 - Restructuring (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Restructuring Charges $ 5,825 $ 4,232 $ 3,443
Engineering Technologies Group [Member]      
Restructuring Charges 3,879 160 75
Food Service Equipment Group [Member]      
Restructuring Charges 1,186 2,979 2,578
Electronics Products Group [Member]      
Restructuring Charges 499 841 $ 570
Manufacturing Footprint Optimization at the Enginetics, Huber Heights, Ohio Facility [Member] | Engineering Technologies Group [Member]      
Restructuring Charges 3,600    
Expenses to Gain Organization Efficiencies [Member] | Food Service Equipment Group [Member]      
Restructuring Charges 1,200    
Expenses to Move Facility in China Due to Government Directives [Member] | Electronics Products Group [Member]      
Restructuring Charges $ 500    
Sale of Vacant Property [Member]      
Restructuring Charges   1,700  
Discontinued Product Line [Member]      
Restructuring Charges   $ 700