Employee Benefit Plans - Severance Plans - Components and Changes of Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Changes and Components of Benefit Obligation:
Benefit obligation at beginning of year	$ 2,971	$ 2,739
Service cost	512	496	$ 489
Interest cost	69	46	66
Actuarial (gain) loss for the period	(941)	(258)
Benefits paid	(53)	(52)
Benefit obligation at end of year	2,558	2,971	$ 2,739
Balance in current liabilities	496	540
Balance in non-current liabilities	2,062	2,431
Total benefit obligation recognized in the Consolidated Balance Sheets	$ 2,558	$ 2,971