Fair Value Measurements (Estimated Fair Values of Financial Instruments) (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Financial assets:
Interest bearing deposits with banks	$ 3,935,000	$ 82,000
Interest bearing time deposits with banks	1,470,000	2,210,000
Restricted investment in bank stock	3,487,000	3,442,000
Financial liabilities:
Deposits: Non-interest bearing	160,682,000	134,703,000
Deposits: Interest bearing	434,153,000	397,234,000
Short-term borrowings	24,107,000	13,129,000
Federal Reserve Bank ("FRB") advances	31,298,000	0
Long-term debt	35,000,000	45,000,000
Interest rate swaps	206,000
Other interest bearing liabilities	1,590,000	1,603,000
Carrying Value [Member]
Financial assets:
Cash and due from banks	12,259,000	12,658,000
Interest bearing deposits with banks	3,935,000	82,000
Interest bearing time deposits with banks	1,470,000	2,210,000
Securities	286,868,000	211,830,000
Restricted investment in bank stock	3,487,000	3,442,000
Loans, net of allowance for loan losses	417,038,000	397,629,000
Accrued interest receivable	2,404,000	1,607,000
Financial liabilities:
Deposits: Non-interest bearing	160,682,000	134,703,000
Deposits: Interest bearing	434,153,000	397,234,000
Securities sold under agreements to repurchase	4,107,000	3,429,000
Short-term borrowings	20,000,000	9,700,000
Federal Reserve Bank ("FRB") advances	31,298,000
Long-term debt	35,000,000	45,000,000
Interest rate swaps	206,000
Other interest bearing liabilities	1,590,000	1,603,000
Accrued interest payable	389,000	473,000
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	12,259,000	12,658,000
Interest bearing deposits with banks	3,935,000	82,000
Interest bearing time deposits with banks	1,470,000	2,210,000
Securities	286,868,000	211,830,000
Loans, net of allowance for loan losses	418,706,000	403,359,000
Accrued interest receivable	2,404,000	1,607,000
Financial liabilities:
Deposits: Non-interest bearing	160,682,000	134,703,000
Deposits: Interest bearing	438,699,000	399,848,000
Short-term borrowings	20,001,000	9,700,000
Federal Reserve Bank ("FRB") advances	31,298,000
Long-term debt	37,520,000	45,809,000
Interest rate swaps	206,000
Other interest bearing liabilities	1,592,000	1,603,000
Accrued interest payable	389,000	473,000
Off-balance sheet financial instruments:
Commitments to extend credit	0	0
Letters of credit	$ 0	$ 0