Condensed Financial Information (Parent Company Only) - Condensed Statement of Income and Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income
Interest on ESOP loan	$ 19,616	$ 18,443
Deposits with financial institutions	129	44
Total interest and dividend income	22,794	21,338
Benefit for Income Taxes	2,725	2,274
Net Income	1,738	3,919
Comprehensive Income (Loss)	(797)	1,363
Parent Company [Member]
Income
Interest on ESOP loan	123	106
Deposits with financial institutions	0	0
Total interest and dividend income	123	106
Expense	179	160
Income Before Income Tax	(56)	(54)
Benefit for Income Taxes	(19)	(19)
Loss Before Equity in Undistributed Loss of Subsidiary	(37)	(35)
Equity in Undistributed Income of Subsidiary	1,775	3,954
Net Income	1,738	3,919
Comprehensive Income (Loss)	$ (797)	$ 1,363