Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	$ 549,050	$ 609,870
Deferred loan (fees) and costs	104	(711)
Total loans	549,154	609,159
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	123,933	191,540
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	194,754	187,221
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	168,247	177,155
Construction & Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	46,042	36,038
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred loan (fees) and costs	$ 16,074	$ 17,916