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Statements of Operations-Additional Information (Tables)
 12 Months Ended
Jun. 30, 2018
Supplemental Income Statement Elements [Abstract]  
Schedule of additional information of statements of operations
For the Years Ended June 30
    
2018
    
2017
    
2016
  
Interest expense, net                                      
Term loan
       $ 8,321         $ 11,482         $ 11,631    
Revolving credit facility
         2,777           2,897           2,257    
Amortization of debt issuance costs and debt discount
         883           1,015           989    
Acquisition-related accrued interest
         1,085           1,373           1,476    
Other
         537           105           495    
Interest expense
         13,603           16,872           16,848    
Interest (income)
         (1,693)           (1,966)           (256)    
        $ 11,910         $ 14,906         $ 16,592    
Depreciation and amortization                                      
Depreciation of property, plant and equipment
       $ 21,044         $ 19,916         $ 17,659    
Amortization of intangible assets
         5,851           5,950           5,559    
Amortization of other assets
         48           135           234    
        $ 26,943         $ 26,001         $ 23,452    
 
For the Years Ended June 30
    
2018
    
2017
    
2016
  
Research and development expenditures
       $   9,998         $  9,442         $  11,029