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Note J - Business Segments and Foreign Operations (Details Textual)
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer 1 [Member]      
Concentration Risk, Percentage 12.00%    
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer 2 [Member]      
Concentration Risk, Percentage 12.00%    
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Number of Customers 2 1 1
Concentration Risk, Percentage   11.00% 11.00%
Number of Reportable Segments 2