Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Deferred tax assets:
Employee related accruals	$ 6,879	$ 6,337
Inventory	2,288	2,094
Environmental remediation	751	765
Net operating loss carry forwards-domestic	1,323	1,522
Net operating loss carry forwards-foreign	4,348	5,517
Operating lease liabilities	7,639	8,312
Other	(1,066)	4,672
Deferred tax assets, gross	22,162	29,219
Valuation allowance	(2,618)	(3,709)	$ (3,403)	$ (808)
Deferred tax assets, net of valuation allowance	19,544	25,510
Deferred tax liabilities:
Property, plant and equipment and intangible assets	(7,187)	(7,550)
Operating lease ROU assets	(7,489)	(8,251)
Other	(24)	(793)
Total	(14,700)	(16,594)
Net deferred tax asset	$ 4,844	$ 8,916