Loans Held for Investment - Composition of Net Loans Held for Investment by Class (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	$ 691,420	$ 688,750
Less:
Less: allowance for credit losses on loans	(5,986)	(6,420)
Deferred loan costs net	811	812
Net loans held for investment	686,245	683,142
Commercial [Member] \| Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	110,491	110,088
Commercial [Member] \| Real Estate - Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	253,108	255,850
Commercial [Member] \| Other Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	64,119	57,247
Commercial [Member] \| Other Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	5,089	4,683
Non-Commercial [Member] \| Consumer Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	9,225	9,611
Non-Commercial [Member] \| Real Estate 1 - 4 Family Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	20,447	19,453
Non-Commercial [Member] \| Real Estate - Residential [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	152,162	158,556
Non-Commercial [Member] \| Home Equity [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, Total	$ 76,779	$ 73,262