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Statements of Operations-Additional Information (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Interest expense, net    
Amortization of debt issuance costs and debt discount $ 221 $ 221
Acquisition-related accrued interest   253
Other 163 239
Interest expense 3,243 3,427
Interest (income) (460) (309)
Interest expense 2,783 3,118
Depreciation and amortization    
Depreciation of property, plant and equipment 5,188 5,183
Amortization of intangible assets 1,491 1,449
Amortization of other assets 12 12
Depreciation and amortization 6,691 6,644
Term loan    
Interest expense, net    
Interest expense 2,112 2,033
Revolving credit facility    
Interest expense, net    
Interest expense $ 747 $ 681