Statements of Operations - Interest Expense and Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Interest expense, net
Amortization of debt issuance costs	$ 148	$ 221
Other	45	67
Interest expense	3,065	3,109
Interest income	(176)	(299)
Interest expense, net	2,889	2,810
Depreciation and amortization
Depreciation of property, plant and equipment	5,714	5,831
Amortization of intangible assets	2,135	2,205
Amortization of other assets	5
Depreciation and amortization	7,854	8,036
Term Loan
Interest expense, net
Interest expense	2,273	1,875
Revolving credit facility (the "Revolver")
Interest expense, net
Interest expense	$ 599	$ 946