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Note 10 - Leases and Purchase Commitments (Detail) - Minimum Annual Rental Commitments (USD $)
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
          $ 1,343,000
        1,337,000  
      1,201,000    
    1,009,000      
  995,000        
$ 1,078,000