Deposits - Summary of Deposit Accounts (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Deposits [Abstract]
Demand, noninterest-bearing	$ 210,404	$ 192,773
Demand, interest-bearing	273,673	254,478
Money market and savings	258,334	228,048
Time deposits, $250 and over	51,563	45,616
Time deposits, other	247,798	225,857
Total deposits	$ 1,041,772	$ 946,772
Demand, noninterest-bearing	20.20%	20.36%
Demand, interest-bearing	26.26%	26.88%
Money market and savings	24.80%	24.09%
Time deposits, $250 and over	4.95%	4.82%
Time deposits, other	23.79%	23.86%
Total deposits	100.00%	100.00%