Deposits - Summary of Deposit Accounts (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
Demand, noninterest-bearing	$ 74,303	$ 42,374
Demand, interest-bearing	31,666	15,883
Money market and savings	132,412	81,756
Time deposits, $250,000 and over	45,214	47,112
Time deposits, other	88,458	95,929
Total deposits	$ 372,053	$ 283,054
Demand, noninterest-bearing	19.97%	14.97%
Demand, interest-bearing	8.51%	5.61%
Money market and savings	35.59%	28.88%
Time deposits, $250,000 and over	12.15%	16.64%
Time deposits, other	23.78%	33.89%
Total deposits	100.00%	100.00%