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Note 3 - Property and Equipment, Net (Tables)
 3 Months Ended
Sep. 30, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
    
June 30,
  
   
2017
    
2017
  
                 
Land and building
   $
1,250
     $
1,250
  
Leasehold improvements
    
1,268
      
1,268
  
Machinery and equipment
    
5,868
      
5,777
  
Transportation equipment
    
11
      
11
  
     
8,397
      
8,306
  
Less: Accumulated depreciation
  and amortization
    
(6,765
 )    
(6,705
 )
Total
   $
1,632
     $
1,601