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Earnings Per Share ("EPS") - Factors Used in Earnings Per Common Share Computation (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 1,463	$ 964	$ 2,794	$ 2,064
Basic weighted average shares outstanding	3,240,376	3,266,353	3,240,376	3,399,814
Less: Average unallocated ESOP shares	(204,478)	(223,723)	(206,884)	(226,129)
Basic average shares outstanding	3,035,898	3,042,630	3,033,492	3,173,685
Diluted effect of restricted stock awards and stock options	36,598	57,282	24,141	54,778
Diluted average shares outstanding	3,072,496	3,099,912	3,057,633	3,228,463
Basic earnings per common share	$ 0.48	$ 0.32	$ 0.92	$ 0.65
Diluted earnings per common share	$ 0.48	$ 0.31	$ 0.91	$ 0.64

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