Supplemental Financial Information - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss)
Balance	$ 53,189	$ 68,840
Other comprehensive loss	(791)
Balance	53,659	53,189
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss)
Balance	(1,541)	2,457
Other comprehensive loss		(3,998)
Balance	(2,332)	(1,541)
Change in Defined Pension Benefit Obligation
Accumulated Other Comprehensive Income (Loss)
Balance	3,947	(364)
Other comprehensive loss	(1,193)	4,311
Balance	2,754	3,947
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance	2,406	2,093
Other comprehensive loss	(1,984)	313
Balance	$ 422	$ 2,406