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Fair Value Measurements (Tables)
12 Months Ended
Jun. 30, 2019
Fair Value Disclosures [Abstract]  
Schedule of fair value of derivative instruments based upon pricing models
As of June 30
   
2019
   
2018
 
     
Level 1
   
Level 2
   
Level 1
   
Level 2
 
Short-term investments
      $ 24,000         $         $ 50,000         $    
Derivatives asset (liability)
      $         $ 383         $         $ 71    
Interest rate swap (liability)
      $         $ (977)         $         $ 5,078