Employee Benefits - Summary Information for Plans (Comprised Solely of One Domestic Plan) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 1,574	$ 1,390
Interest cost	40	47
Actuarial (gain) loss	(51)	168
Benefits paid	(28)	(31)
Benefit obligation end of year	1,535	1,574
Change in Fair Value of Plan Assets:
Beginning fair value	923	827
Actual return (loss) on plan assets	85	(5)
Contribution by employer	100	132
Benefits paid	(28)	(31)
Plan assets at end of year	1,080	923
Funded status of the plans	(455)	(651)
Unrecognized actuarial loss	293	469
Accrued benefit cost	(162)	(182)
Amounts Recognized in Consolidated Balance Sheets
Accrued benefit cost	(162)	(182)
Accumulated other comprehensive loss	293	469
Net amount recognized	$ (455)	$ (651)