Fair Values of Financial Instruments - Estimated fair values of the Company's financial instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets: Carrying Amount
Cash and due from banks	$ 2,035	$ 2,111
Interest-bearing deposits in other financial institutions	22,680	56,434
Federal funds sold	5,377	3,636
Investment securities available for sale	144,133	155,927
Investments in restricted stock	221	1,062
Ground rents	131	131
Loans, less allowance for credit losses	184,278	207,922
Accrued interest receivable	1,159	1,085
Cash value of life insurance	8,493	8,338
Financial liabilities: Carrying Amount
Deposits	362,947	383,247
Long-term borrowings		10,000
Short-term borrowings		10,000
Accrued interest payable	9	11
Unrecognized financial instruments: Carrying Amount
Commitments to extend credit	30,718	28,167
Standby letters of credit	45	55
Financial Assets: Fair Value
Cash and due from banks	2,035	2,111
Interest-bearing deposits in other financial institutions	22,680	56,434
Federal funds sold	5,377	3,636
Investment securities available for sale	144,133	155,927
Investments in restricted stock	221	1,062
Ground rents	131	131
Loans, less allowance for credit losses	177,254	211,541
Accrued interest receivable	1,159	1,085
Cash value of life insurance	8,493	8,338
Financial liabilities: Fair Value
Deposits	299,773	383,910
Long-term borrowings		9,888
Short-term borrowings		10,000
Accrued interest payable	9	11
Unrecognized financial instruments: Fair Value
Commitments to extend credit	30,718	28,167
Standby letters of credit	$ 45	$ 55