Federal Home Loan Bank Advances and Other Borrowings - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Federal Reserve Bank of Atlanta [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 5,700,000	$ 9,900,000
Line of Credit Facility, Current Borrowing Capacity		0	0
Bank's residential and commercial real estate loans [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Collateral Amount		15,658,000	37,248,000
Line of Credit Facility, Maximum Borrowing Capacity		15,700,000	19,200,000
Bank's residential and commercial real estate loans [Member] | Federal Reserve Bank of Atlanta [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt, Current		9,300,000	15,000,000
Unsecured federal funds lines of credit [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt, Current		19,500,000	18,300,000
Fhlb Advance [Member]
Line Of Credit Facility [Line Items]
Gain on extinguishment of debt	$ 26,749	$ 12,212
Debt prepayment fees	$ 14,537
Line of Credit Facility, Maximum Borrowing Capacity			$ 9,515,477