FAIR VALUE - Estimated fair values of the Company's financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial assets - Carrying Amount
Cash and due from banks	$ 2,130	$ 2,117
Interest-bearing deposits	33,277	29,730
Federal funds sold	5,067	5,246
Debt securities	134,897	114,049
Investments in restricted stock	1,062	1,199
Ground rents	140	140
Loans, net	243,932	252,296
Accrued interest receivable	1,277	1,302
Cash value of life insurance	8,219	8,181
Financial liabilities - Carrying Amount
Deposits	368,923	349,620
Short-term borrowings	31,244	29,912
Accrued interest payable	17	16
Unrecognized financial instruments:
Commitments to extend credit	30,729	31,561
Standby letters of credit	1,044	1,044
Financial assets - Fair Value
Cash and due from banks	2,130	2,117
Interest-bearing deposits	33,277	29,730
Federal funds sold	5,067	5,246
Investment securities	134,897	114,049
Investments in restricted stock	1,062	1,199
Ground rents	140	140
Loans, less allowance for credit losses	249,391	253,946
Accrued interest receivable	1,277	1,302
Cash value of life insurance	8,219	8,181
Financial liabilities - Fair Value
Deposits	369,234	350,666
Short-term borrowings	31,236	29,935
Accrued interest payable	17	16
Unrecognized financial instruments:
Commitments to extend credit	30,729	31,561
Standby letters of credit	$ 1,044	$ 1,044