Earnings (Loss) Per Share - Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net loss		$ (508)	$ (241)	$ (869)	$ (296)
Weighted shares outstanding for basic EPS
Weighted average shares outstanding		5,991,777,000	6,289,572,000	5,997,436,000	6,282,749,000
Less: Weighted average unallocated ESOP shares		446,442,000	446,468,000	448,874,000	424,300,000
Weighted average shares outstanding for basic EPS		5,545,335	5,843,104	5,548,562	5,858,449
Additional dilutive shares	[1]	0	0	0	0
Weighted average shares outstanding for dilutive EPS	[2]	5,545,335	5,843,104	5,548,562	5,858,449
Basic (loss) per share		$ (0.09)	$ (0.04)	$ (0.16)	$ (0.05)
Diluted (loss) per share	[1],[2]	$ (0.09)	$ (0.04)	$ (0.16)	$ (0.05)

[1] For the three and six months ended June 30, 2023 and June 30, 2022, the effect of stock options was anti-dilutive due to the net loss and therefore no dilutive shares are included in the weighted average shares outstanding or diluted loss calculations.

[2] Diluted loss per share and average shares outstanding excludes all common shares if their effect is anti-dilutive.