Deposits - Summary of Deposit Accounts (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Demand, noninterest-bearing	$ 129,243	$ 66,573
Demand, interest-bearing	256,258	158,708
Money market and savings	205,843	69,188
Time deposits, $250,000 and over	56,266	14,253
Time deposits, other	124,055	66,402
Total deposits	$ 771,665	$ 375,124
Demand, noninterest-bearing	16.75%	17.75%
Demand, interest-bearing	33.21%	42.31%
Money market and savings	26.67%	18.44%
Time deposits, $250,000 and over	7.29%	3.80%
Time deposits, other	16.08%	17.70%
Total deposits	100.00%	100.00%