FAIR VALUE - Estimated fair values of the Company's financial instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financial assets - Carrying Amount
Cash and due from banks	$ 2,223	$ 2,117
Interest-bearing deposits in other financial institutions	20,145	29,730
Federal funds sold	4,400	5,246
Investment securities available for sale	157,591	114,049
Investments in restricted stock	1,062	1,199
Ground rents	140	140
Loans, less allowance for credit losses	231,984	252,296
Accrued interest receivable	1,304	1,302
Cash value of life insurance	8,258	8,181
Financial liabilities - Carrying Amount
Deposits	368,884	349,620
Short-term borrowings	25,237	29,912
Accrued interest payable	15	16
Unrecognized financial instruments:
Commitments to extend credit	30,706	31,561
Standby letters of credit	1,044	1,044
Financial assets - Fair Value
Cash and due from banks	2,223	2,117
Interest-bearing deposits in other financial institutions	20,145	29,730
Federal funds sold	4,400	5,246
Investment securities available for sale	157,591	114,049
Investments in restricted stock	1,062	1,199
Ground rents	140	140
Loans, less allowance for credit losses	238,850	253,946
Accrued interest receivable	1,304	1,302
Cash value of life insurance	8,258	8,181
Financial liabilities - Fair Value
Deposits	370,102	350,666
Short-term borrowings	25,245	29,935
Accrued interest payable	15	16
Unrecognized financial instruments:
Commitments to extend credit	30,706	31,561
Standby letters of credit	$ 1,044	$ 1,044