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Note 7 - Leases And Royalties (Detail) - Summary of future payments for operating leases and royalties: (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
2013         $ 1,870
2013         1,693
2014       1,101  
2014       1,801  
2015     1,074    
2015     1,781    
2016   1,035      
2016   468      
2017 884        
2017 188        
Thereafter 2,485        
8,449        
$ 5,931