Earnings Per Share - Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2021	[1]	Dec. 31, 2020
Net income		$ 85		$ 1,317	[2]
Weighted shares outstanding for basic EPS
Weighted average shares outstanding		6,248,678,000		4,807,158,000	[2]
Less: Weighted average unallocated ESOP shares		261,514,000		164,987,000	[2]
Weighted average shares outstanding for basic EPS	[3]	5,987,164		4,642,171	[2]
Additional dilutive shares		203,245,000		43,037	[2]
Weighted average shares outstanding for dilutive EPS		6,190,409		4,685,208	[2]
Basic income per share		$ 0.01		$ 0.28	[2]
Diluted income per share	[3]	$ 0.01		$ 0.28	[2]
Restated [Member]
Net income	[1]			$ 1,317
Weighted shares outstanding for basic EPS
Weighted average shares outstanding	[1]			6,327,662
Less: Weighted average unallocated ESOP shares	[1]			217,172
Weighted average shares outstanding for basic EPS	[1]			6,110,490
Additional dilutive shares	[1]			56,649
Weighted average shares outstanding for dilutive EPS	[1]			6,167,139
Basic income per share	[1]			$ 0.22
Diluted income per share	[1]			$ 0.21

[1] Amounts related to periods prior to the date of Conversion (July 2021) have been restated to give the retroactive recognition to the exchange ratio applied in the Conversion (1.3163) (See Note 1).

[2] Amounts related to periods prior to the date of Conversion (July 2021) have not been restated to give the retroactive recognition to the exchange ratio applied in the Conversion (1.3163) (See Note 1).

[3] Amounts related to periods prior to the date of Conversion (July 2021) have not been restated to give the retroactive recognition to the exchange ratio applied in the Conversion (1.3163) (See Note 1). Refer to Note 18 Earnings Per Share for retroactive recognition given to the exchange ratio applied in the Conversion for the year ended December 31, 2020.