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Statements of Operations-Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Interest expense, net        
Amortization of debt issuance costs and debt discount $ 220 $ 255 $ 441 $ 508
Acquisition-related accrued interest 252 462 505 855
Other 2 47 241 128
Interest expense 3,323 4,361 6,750 8,948
Interest (income) (273) (489) (582) (1,169)
Interest expense, net 3,050 3,872 6,168 7,779
Depreciation and amortization        
Depreciation of property, plant and equipment 5,222 4,952 10,405 9,683
Amortization of intangible assets 1,397 1,434 2,846 2,962
Amortization of other assets 12 58 24 117
Depreciation and amortization 6,631 6,444 13,275 12,762
Term loan        
Interest expense, net        
Interest expense 2,110 2,866 4,143 5,771
Revolving credit facility        
Interest expense, net        
Interest expense $ 739 $ 731 $ 1,420 $ 1,686