Statements of Operations-Additional Information (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Interest expense, net
Amortization of debt issuance costs and debt discount	$ 220	$ 220	$ 441	$ 441
Acquisition-related accrued interest	0	252		505
Other	120	2	283	241
Interest expense	3,462	3,323	6,705	6,750
Interest (income)	(447)	(273)	(907)	(582)
Interest expense, net	3,015	3,050	5,798	6,168
Depreciation and amortization
Depreciation of property, plant and equipment	5,308	5,222	10,496	10,405
Amortization of intangible assets	1,521	1,397	3,012	2,846
Amortization of other assets	12	12	24	24
Depreciation and amortization	6,841	6,631	13,532	13,275
Term loan
Interest expense, net
Interest expense	2,202	2,110	4,314	4,143
Revolving credit facility
Interest expense, net
Interest expense	$ 920	$ 739	$ 1,667	$ 1,420