FAIR VALUE - Estimated fair values of the Company's financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial assets - Carrying Amount
Cash and due from banks	$ 2,658	$ 2,420
Interest-bearing deposits	14,159	10,017
Federal funds sold	1,254	853
Debt securities	70,172	71,486
Investments in restricted stock	1,199	1,437
Ground rents	143	143
Loans, net	275,042	282,672
Accrued interest receivable	970	961
Cash value of life insurance	8,062	8,023
Financial liabilities - Carrying Amount
Deposits	321,780	321,440
Short-term borrowings	20,000	25,000
Accrued interest payable	95	100
Unrecognized financial instruments:
Commitments to extend credit	30,127	26,297
Standby letters of credit	1,044	1,059
Financial assets - Fair Value
Cash and due from banks	2,658	2,420
Interest-bearing deposits	14,159	10,017
Federal funds sold	1,254	853
Investment securities	70,172	71,486
Investments in restricted stock	1,199	1,437
Ground rents	143	143
Loans, less allowance for credit losses	278,025	282,583
Accrued interest receivable	970	961
Cash value of life insurance	8,062	8,023
Financial liabilities - Fair Value
Deposits	322,965	300,944
Short-term borrowings	20,060	25,386
Accrued interest payable	95	100
Unrecognized financial instruments:
Commitments to extend credit	30,127	26,297
Standby letters of credit	$ 1,044	$ 1,059