Fair Value Measurements (Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Interest bearing deposits with banks	$ 19,753	$ 82
Interest bearing time deposits with banks	735	2,210
Restricted investment in bank stock	3,423	3,442
Financial liabilities:
Deposits: Non-interest bearing	168,115	134,703
Deposits: Interest bearing	454,751	397,234
Short-term borrowings	24,750	13,129
Federal Reserve Bank ("FRB") advances	27,955	0
Long-term debt	35,000	45,000
Other interest bearing liabilities	1,584	1,603
Carrying Value [Member]
Financial assets:
Cash and due from banks	11,868	12,658
Interest bearing deposits with banks	19,753	82
Interest bearing time deposits with banks	735	2,210
Securities	287,506	211,830
Restricted investment in bank stock	3,423	3,442
Loans, net of allowance for loan losses	418,567	397,629
Accrued interest receivable	2,105	1,607
Financial liabilities:
Deposits: Non-interest bearing	168,115	134,703
Deposits: Interest bearing	454,751	397,234
Securities sold under agreements to repurchase	4,750	3,429
Short-term borrowings	20,000	9,700
Federal Reserve Bank ("FRB") advances	27,955
Long-term debt	35,000	45,000
Interest rate swaps	57
Other interest bearing liabilities	1,584	1,603
Accrued interest payable	448	473
Off-balance sheet financial instruments:
Commitments to extend credit	0	0
Letters of credit	0	0
Fair Value [Member]
Financial assets:
Cash and due from banks	11,868	12,658
Interest bearing deposits with banks	19,753	82
Interest bearing time deposits with banks	735	2,210
Securities	287,506	211,830
Loans, net of allowance for loan losses	424,791	403,359
Accrued interest receivable	2,105	1,607
Financial liabilities:
Deposits: Non-interest bearing	168,115	134,703
Deposits: Interest bearing	459,224	399,848
Short-term borrowings	20,002	9,700
Federal Reserve Bank ("FRB") advances	27,955
Long-term debt	37,365	45,809
Interest rate swaps	57
Other interest bearing liabilities	1,585	1,603
Accrued interest payable	448	473
Off-balance sheet financial instruments:
Commitments to extend credit	0	0
Letters of credit	$ 0	$ 0