Statements of Operations - Interest Expense and Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Interest expense, net
Amortization of debt issuance costs	$ 221	$ 221
Other	67	133
Interest expense	3,109	3,833
Interest (income)	(299)	(479)
Interest expense, net	2,810	3,354
Depreciation and amortization
Depreciation of property, plant and equipment	5,831	5,731
Amortization of intangible assets	2,205	2,038
Amortization of other assets	0	12
Depreciation and amortization	8,036	7,781
Term Loan
Interest expense, net
Interest expense	1,875	2,048
Revolving credit facility (the "Revolver")
Interest expense, net
Interest expense	$ 946	$ 1,431