Fair Value Measurements, Measured On A Recurring And Nonrecurring Basis (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired loans, estimated selling cost	$ 449,000	$ 424,000
Recurring [Member]
Assets [Abstract]
Equity securities	1,696,000	701,000
Available for sale securities [Abstract]
U.S. Agency Securities	80,698,000	84,863,000
U.S. Treasury securities	28,167,000	27,661,000
Obligations of state and political subdivisions	91,848,000	61,455,000
Corporate obligations	6,507,000	3,328,000
Mortgage-backed securities in government sponsored entities	80,618,000	63,399,000
Liabilities [Abstract]
Interest rate swaps	448,000
Recurring [Member] | Level I [Member]
Assets [Abstract]
Equity securities	1,696,000	701,000
Available for sale securities [Abstract]
U.S. Agency Securities	0	0
U.S. Treasury securities	28,167,000	27,661,000
Obligations of state and political subdivisions	0	0
Corporate obligations	0	0
Mortgage-backed securities in government sponsored entities	0	0
Liabilities [Abstract]
Interest rate swaps	0
Recurring [Member] | Level II [Member]
Assets [Abstract]
Equity securities	0	0
Available for sale securities [Abstract]
U.S. Agency Securities	80,698,000	84,863,000
U.S. Treasury securities	0	0
Obligations of state and political subdivisions	91,848,000	61,455,000
Corporate obligations	6,507,000	3,328,000
Mortgage-backed securities in government sponsored entities	80,618,000	63,399,000
Liabilities [Abstract]
Interest rate swaps	448,000
Recurring [Member] | Level III [Member]
Assets [Abstract]
Equity securities	0	0
Available for sale securities [Abstract]
U.S. Agency Securities	0	0
U.S. Treasury securities	0	0
Obligations of state and political subdivisions	0	0
Corporate obligations	0	0
Mortgage-backed securities in government sponsored entities	0	0
Liabilities [Abstract]
Interest rate swaps	0
Nonrecurring [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	4,072,000	3,860,000
Other real estate owned	2,692,000	3,299,000
Nonrecurring [Member] | Level I [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	0	0
Other real estate owned	0	0
Nonrecurring [Member] | Level II [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	0	0
Other real estate owned	0	0
Nonrecurring [Member] | Level III [Member]
Fair value assets and liabilities measured on non-recurring basis [Abstract]
Impaired Loans	4,072,000	3,860,000
Other real estate owned	$ 2,692,000	$ 3,299,000