Note 4 - Fair Value Measurements (Tables)
 12 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
 
 
Total carrying
value a
s of
 
 
Fair Value Measurements Using
Inputs Considered as
 
 
 
June 30, 2017
 
 
Level 1
 
 
Level 2
 
 
Level 3
 
Assets
                                
Equity securities (1)
   $
59,616
     $
59,616
     $
-
     $
-
  
Corporate bond securities (1)
    
2,057
      
-
      
2,057
      
-
  
Total Assets
   $
61,673
     $
59,616
     $
2,057
     $
-
  
                                 
Liabilities
                                
Contingent Consideration
   $
68,400
     $
-
     $
-
     $
68,400
  
 
 
Total carrying
value a
s of
 
 
Fair Value Measurements Using
Inputs Considered as
 
 
 
June 30, 2016
 
 
Level 1
 
 
Level 2
 
 
Level 3
 
Assets
                                
Equity securities (1)
   $
28,582
     $
28,582
     $
-
     $
-
  
Corporate bond securities (1)
    
-
      
-
      
-
      
-
  
Total Assets
   $
28,582
     $
28,582
     $
-
     $
-
  
                                 
Liabilities
                                
Contingent Consideration
   $
38,500
     $
-
     $
-
     $
38,500
  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
 
 
June 30,
 
 
 
2017
 
Fair value at the beginning of period
    
38,500
  
Purchase price contingent consideration (Note 2)
    
40,000
  
Payments
    
(28,500
)
Change in fair value of contingent consideration
    
18,400
  
Contingent consideration payable
   $
68,400