Fair Value Measurements and Disclosure - Summary of Carrying Amounts and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial Assets: (Carrying Amount)
Cash and cash equivalents	$ 53,351	$ 158,716
Securities AFS	83,402	101,158
Securities HTM	201	208
Loans receivable, net	1,353,907	1,318,543
Restricted bank stock	1,742	1,345
Accrued interest receivable	4,756	4,218
Financial Liabilities (Carrying Amount)
Deposits	1,347,730	1,446,143
Borrowings	10,000	0
Accrued interest payable	1,027	1,044
Financial Assets: (Fair Value)
Securities AFS	83,402	101,158
Securities HTM	200	225
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]
Financial Assets: (Fair Value)
Cash and cash equivalents	53,351	158,716
Securities AFS	83,402	101,158
Securities HTM	200	225
Loans receivable, net	1,347,137	1,384,470
Restricted bank stock	1,742	1,345
Accrued interest receivable	4,756	4,218
Financial Liabilities (Fair Value)
Deposits	1,225,087	1,438,912
Borrowings	10,000
Accrued interest payable	1,027	1,044
Fair Value, Inputs, Level 1 [Member]
Financial Assets: (Fair Value)
Cash and cash equivalents	53,351	158,716
Fair Value, Inputs, Level 2 [Member]
Financial Assets: (Fair Value)
Securities AFS	81,341	100,356
Securities HTM	200	225
Restricted bank stock	1,742	1,345
Accrued interest receivable	4,756	4,218
Financial Liabilities (Fair Value)
Deposits	1,225,087	1,438,912
Borrowings	10,000
Accrued interest payable	1,027	1,044
Fair Value, Inputs, Level 3 [Member]
Financial Assets: (Fair Value)
Securities AFS	2,061	802
Loans receivable, net	$ 1,347,137	$ 1,384,470