Loans - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 16,050	$ 13,158
Net deferred loan fees	2,664	2,743
Accrued interest receivable	13,513	12,819
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,370	3,698
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 289	$ 326