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Employee Benefits - Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Retirement Benefits [Abstract]
Service cost	$ 53	$ 50
Interest cost	93	107
Amortization of (Gain) or Loss	25	16
Net periodic benefit cost, Total	$ 171	$ 173

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